The Ultimate Guide to PPC Marketing In 2024

PPC campaigns is the cost-effective way to drive targeted traffic to a website, as businesses only pay when a user clicks on their ad. However, it’s important to note that PPC can be a complex and constantly changing field, and it’s recommended to work with a professional or an agency to manage your PPC campaigns if you don’t have the expertise in-house.

PPC ads typically appear on search engine results pages (SERPs) and are associated with specific keywords. Advertisers bid on these keywords, and the highest bidder’s ads will appear at the top of the SERP.

What is PPC advertising?

PPC (pay-per-click) is a type of online advertising where businesses pay a fee each time one of their ads is clicked. It is a form of paid search marketing, which allows businesses to place ads on search engine results pages (SERPs) and other websites in order to reach a specific target audience.

Advertisers can create and manage their PPC campaigns using platforms such as Google Ads, Bing Ads, and Amazon Advertising. These platforms provide tools that allow advertisers to create and target ads, set budgets, and track performance.

What are the benefits of PPC?

PPC (pay-per-click) advertising can provide a number of powerful benefits for businesses, including.

Targeted reach: PPC advertising allows businesses to target specific audiences based on factors such as keywords, location, and demographics.
Cost-effective: PPC advertising is a cost-effective way to drive traffic to a website, as businesses only pay when a user clicks on their ad.
Quick results: PPC advertising can provide quick results, as ads can be set up and run within a matter of hours.
Measurable: PPC advertising is highly measurable, and businesses can track various metrics such as click-through rates, conversion rates, and return on investment. This allows businesses to optimize their campaigns and make data-driven decisions.
Flexibility: PPC advertising is highly flexible, and businesses can adjust their campaigns at any time to reflect changes in their business or the market.
Branding: PPC advertising can be used to build brand awareness and increase visibility, as ads can be placed on search engine results pages and other websites.
Local targeting: PPC advertising allows businesses to target specific geographic areas, which can be very useful for local businesses.
Remarketing: PPC advertising allows businesses to create remarketing campaigns, which can target users who have previously interacted with the business’s website or ads.

You might be wondering how PPC basically work?

This guide will show you the most essential things about PPC and how to create your first ad campaign.

When a user types a query into a search engine, the search engine will display a list of results that are relevant to the user’s query. These results may include ads at the top or bottom of the page, which are labeled as such. When a user clicks on one of these ads, the advertiser pays the search engine a small fee. The advertiser’s goal is to drive valuable traffic to their website, which can lead to increased sales or leads.

Table of Content

What is a PPC Ad Network and Best PPC Ad Networks
How to Get the Most from Your PPC Ads
What you need to know about Ad Group Best Practices
What You Need to Know About PPC Budgets & Bidding
What you should know about PPC Ad Targeting Options
PPC Copywriting Best Practices
Everything You Need to Know About Ad Extensions
Digital Advertising Law
Conclusion

What is a PPC Ad Network and 5 Best PPC ad Networks

PPC (pay-per-click) ad networks are platforms that enable advertisers to place advertisements on websites or search engine results pages (SERPs) and only pay when a user clicks on their ad. These networks employ an auction system, in which advertisers bid on specific keywords or placements, with the highest bidder having their ad displayed.

Here I list the top 5 PPC ads network based on popularity.

Google Ads (formerly known as Google AdWords)

Google Ads (formerly known as Google AdWords) is a platform that allows businesses to create and display ads on Google search results pages and on the Google Display Network. The platform uses a pay-per-click (PPC) model, which means that businesses are charged a fee each time someone clicks on one of their ads. Google Ads is one of the most popular PPC platforms because of the large reach and targeting options it provides. Businesses can target specific keywords, demographics, and interests, and can also use remarketing to reach people who have previously interacted with their website. Additionally, Google Ads allows businesses to track conversions and optimize their campaigns for better results.

Facebook Ads

Facebook Ads is a platform that allows businesses to create and display ads on the Facebook social media platform. The platform uses a pay-per-click (PPC) model, which means that businesses are charged a fee each time someone clicks on one of their ads. Facebook Ads is a popular PPC platform because of the large reach and targeting options it provides. Businesses can target specific demographics, interests, behaviors, and even custom audiences based on their website or email list. Additionally, Facebook Ads allows businesses to track conversions and optimize their campaigns for better results.

Instagram Ads

Instagram Ads is a platform that allows businesses to create and display ads on the Instagram social media platform. The platform uses a pay-per-click (PPC) model, which means that businesses are charged a fee each time someone clicks on one of their ads. Instagram Ads is a popular PPC platform because of the large reach and targeting options it provides. Businesses can target specific demographics, interests, behaviors, and even custom audiences based on their website or email list. Additionally, Instagram Ads allows businesses to track conversions and optimize their campaigns for better results.

Microsoft Advertising

Microsoft Advertising, formerly known as Bing Ads, is a platform that allows businesses to create and display ads on Bing search results pages and on the Microsoft Advertising Network. The platform uses a pay-per-click (PPC) model, which means that businesses are charged a fee each time someone clicks on one of their ads. Microsoft Advertising provides a way to reach an audience that may be different from the one reached through Google Ads.

LinkedIn Ads

LinkedIn Ads is a platform that allows businesses to create and display ads on the LinkedIn social media platform. The platform uses a pay-per-click (PPC) model, which means that businesses are charged a fee each time someone clicks on one of their ads. LinkedIn Ads is a popular PPC platform for B2B businesses because of the professional nature of the platform and the ability to target specific job titles, industries, and company sizes.

Ads Placements. Search engine results, shopping, mobile apps, and YouTube.

Ads Formats. Text, image, responsive, video, Dynamic Search Ads, and shopping campaigns, Story Ads, Slideshow Ads, Lead generation Ads.

Ads Pricing. Cost-per-click (CPC) model based on ad quality and competition. GDN allows for a cost-per-1,000-impressions model (CPM).

Ads platforms are different in terms of services they provide for clients. Deciding where to invest in advertising can be influenced by a number of factors, including.

User base of the platform.
Ad serving volume.
Possibilities for innovation.
Budget for advertisers.

This enables advertisers to reach a large number of potential buyers across audiences and online activities.

How to Get the Most from Your PPC Ads

Choosing to run a pay-per-click ad campaign may seem like a good idea at first, but there are a few more factors to consider in order to optimize your marketing to maximize your earnings, increase conversions, and get a better return on your advertising investment.

Things to consider to get the most from your PPC ads

Define clear goals: Before you start your PPC campaign, it's important to define clear and measurable goals. This will help you to determine the success of your campaign and make data-driven decisions.
Conduct keyword research: Identify the keywords that are relevant to your business and have a high search volume. Use negative keywords to exclude irrelevant searches.
Create compelling ad copy: Use clear and compelling headlines and descriptions that entice users to click on your ad. Include a clear call-to-action (CTA) in your ad.
Use ad extensions: Ad extensions can add more information and value to your ads, like a phone number, location, or additional links.
Optimize your landing pages: Make sure that your landing pages are relevant to your ads and are optimized for conversions.
Use remarketing: Retarget people who have previously interacted with your website or ads.
Monitor and optimize your campaign: Use analytics to track your conversions and ROI. Use A/B testing to try different ad formats, headlines, and descriptions.
Keep monitoring your Quality Score: A high quality score is an indication of a well-structured and relevant ad campaign, it helps to reduce your ad costs and improve ad rank.
Keep experimenting: PPC advertising is a continuous process and it's important to keep experimenting with new targeting options, ad formats and ad copy to find out what works best for your business.

Developing a Digital Advertising Strategy

Developing a digital advertising strategy refers to the process of planning, executing and managing digital advertising campaigns to achieve specific business goals. A digital advertising strategy is a comprehensive plan that outlines the objectives, target audience, budget, and channels to be used in order to reach and engage with potential customers.

The process of developing a digital advertising strategy typically includes the following steps:

Defining business goals and objectives: Identifying the specific business outcomes that the advertising campaigns will aim to achieve, such as increasing website traffic, generating leads or boosting sales.
Audience research: Identifying the target audience and understanding their needs, behaviours, demographics, and interests.
Channels selection: Deciding on the digital platforms and channels that will be used to reach the target audience.
Budget allocation: Determining the budget for the advertising campaigns and allocating it to different channels and campaigns.
Campaign creation: Developing the advertising campaigns, including creating ad copy, images, and videos, and setting targeting options.
Measuring and Optimizing: Continuously monitoring and measuring the performance of the advertising campaigns and making data-driven decisions to optimize and improve the campaigns.
Consistency: Keeping the messaging and branding consistent across all platforms and campaigns

By developing a well-crafted digital advertising strategy, businesses can effectively reach and engage with their target audience, achieve their business goals and optimize the return on investment.

Monitoring & Analysing Ad Performance

Monitoring and analyzing ad performance involves tracking the effectiveness of advertising campaigns and making data-driven decisions to optimize them. This can include tracking metrics such as click-through rate (CTR), conversion rate, and cost per acquisition (CPA). It also involves analyzing data on demographics, geographic location, and other factors to gain insights into which audiences are most responsive to the ads. Tools such as Google Analytics and Facebook Insights can be used to track and analyze ad performance. Additionally, A/B testing and multivariate testing can be used to test different versions of an ad to see which performs best.

What Is Quality Score & Why It Matters

Quality Score is a metric used by Google AdWords to measure the relevance and performance of an advertisement. It is based on the relevance of the ad, the relevance of the landing page, and the overall user experience. The score ranges from 1 to 10, with 10 being the highest possible score. A higher Quality Score can lead to lower costs and better ad positions. Quality Score matters because it is a key factor in determining the cost of a Google AdWords campaign. Ads with a high Quality Score will generally have a lower cost per click (CPC) and a higher ad position than ads with a low Quality Score. This means that a higher Quality Score can lead to more visibility for your ads, more clicks, and more conversions, ultimately resulting in a better return on investment (ROI) for the campaign. Additionally, it is a good indicator of how well the advertisement is resonating with the audience and if the landing page is relevant and providing good user experience.

What Is Click-Through Rate & Why CTR Is Important

Click-through rate (CTR) is a metric used to measure the effectiveness of an online advertising campaign. It is calculated by dividing the number of clicks an ad receives by the number of times the ad is shown (impressions). CTR is typically expressed as a percentage, and the higher the percentage, the more effective the ad is considered to be.

CTR is important because it is a key indicator of how well an ad is resonating with its target audience. A high CTR means that the ad is relevant and compelling, and that the audience is responding positively to it. This can help to ensure that the ad is reaching the right audience and that the ad campaign is successful.

Additionally, high CTR also tends to indicate that the ad is placed in the right place and at the right time, and that it has good targeting options. Low CTR, on the other hand, may indicate that the ad is not resonating with its target audience, or that it is not being placed in the right location.

In this case, the ad campaign may need to be adjusted in order to improve its performance. Overall, CTR is an important metric for advertisers and marketers to track, as it can provide valuable insights into the effectiveness of a campaign and help to optimize ad targeting, placement, and messaging.

What Are Keywords & How They Work in PPC

In pay-per-click (PPC) advertising, keywords are the terms or phrases that advertisers bid on in order to have their ads shown to users who search for those terms. Keywords play a critical role in determining which ads are shown to which users, and how much advertisers pay for each click.

When a user conducts a search on a search engine or visits a website that displays ads, the search engine or website uses an algorithm to match the user’s search query or browsing behavior with the keywords that advertisers have chosen. If there is a match, the advertiser’s ad will be shown to the user. The advertiser will then pay a fee, usually a small amount, each time their ad is clicked on.

Advertisers can select keywords that are relevant to their products or services, and bid on them in order to have their ads shown to users who are likely to be interested in what they have to offer. They can also use negative keywords, which are words or phrases that they do not want their ads to be shown for.

Keyword research is an important step in the PPC advertising process, as it allows advertisers to identify the keywords that are most likely to drive relevant traffic to their websites and result in conversions. Advertisers can use tools such as Google Keyword Planner to research keywords and determine which ones are likely to be the most effective for their PPC campaigns.

The 10 Most Important PPC KPIs You Should Be Tracking

There are many key performance indicators (KPIs) that you can track in a pay-per-click (PPC) campaign, but some are more important than others. The following are 10 of the most important PPC KPIs that you should be tracking:

Click-through rate (CTR): The ratio of clicks to impressions, which indicates how well your ad is resonating with your target audience.
Cost per click (CPC): The average amount you pay for each click on your ad.
Cost per acquisition (CPA): The average amount you pay to acquire a new customer or lead.
Return on ad spend (ROAS): The return on investment (ROI) for your PPC campaign, calculated as revenue divided by ad spend.
Quality Score: A metric used by Google to determine the relevance and quality of your ad, landing page, and keywords.
Impression share: The percentage of impressions your ad receives compared to the total number of impressions available.
Bounce rate: The percentage of visitors who leave your website after viewing only one page.
Time on site: The average amount of time visitors spend on your website.
Engagement rate: The rate at which visitors engage with your website or ad, such as by clicking on a call-to-action button or scrolling through a page.

Keep in mind that depending on your business, there might be other KPIs that are more important to track. It’s important to track and analyze your data in order to optimize your campaigns and make data-driven decisions.

What you need to know about Ad Group Best Practices

Ad groups are a way to organize and structure your pay-per-click (PPC) campaigns, and following best practices can help ensure that your ad groups are effective and efficient.

What is an ad group?

An ad group is a collection of ads and keywords in a pay-per-click (PPC) advertising campaign. Ad groups are used to organize and manage the ads and keywords in a campaign, and can be used to target specific groups of customers based on their search queries or demographics. Each ad group contains one or more ads and is associated with one or more keywords or phrases that trigger the ads to be displayed. Ad groups allow advertisers to fine-tune their campaigns by targeting specific groups of customers and adjusting bids for keywords and ads based on performance.

How to get the best out of ad group?

To get the best out of an ad group, it is essential to follow a few best practices:

Be specific with ad group theme: Each ad group should have a specific theme and target a specific group of customers. This will help ensure that the ads and keywords in the ad group are relevant to the customers and will increase the chances of them clicking on the ad.

Use tightly themed keywords: Use keywords that are tightly related to the theme of the ad group. This will help ensure that your ads are shown to the most relevant customers.

Write compelling ad copy: Make sure that the ad copy is clear, compelling, and relevant to the theme of the ad group. This will help increase the click-through rate (CTR) of the ad.

Use ad extensions: Ad extensions can help increase the visibility of your ad and provide additional information to customers. This can help increase the CTR of the ad and improve the overall performance of the ad group.

Monitor and optimize performance: Regularly monitor the performance of the ad group and make adjustments as needed. This can include adjusting bids, changing ad copy or ad extension, or pausing underperforming keywords.

Test, Test, and Test: Conduct A/B testing on different elements of your ad group such as ad copy, ad format, ad targeting, and landing page. This will help you to identify what works best and what doesn’t and help you optimize your ad group for the best results.

How to Create & Structure Your Ad Groups?

Creating and structuring ad groups properly is an important step in setting up a successful pay-per-click (PPC) advertising campaign. Here are the steps you can follow to create and structure your ad groups:

Determine your campaign structure: Decide on the main themes or product/service categories that you want to promote in your campaign. This will help you to organize your ad groups and make sure that each ad group is targeting a specific group of customers.

Create ad groups: For each main theme or category, create an ad group. Each ad group should have a specific theme or product/service category and target a specific group of customers.

Add keywords: Add keywords that are tightly related to the theme of the ad group. This will help ensure that your ads are shown to the most relevant customers.

Write compelling ad copy: Create ads that are clear, compelling and relevant to the theme of the ad group. This will help increase the click-through rate (CTR) of the ad.

Test, Test and Test: Conduct A/B testing on different elements of your ad group such as ad copy, ad format, ad targeting and landing page. This will help you to identify what works best and what doesn’t and help you optimize your ad group for the best results.

Here are some key things to keep in mind when creating and managing ad groups:

Keep ad groups small and focused: Each ad group should contain a small number of closely related keywords and ads. This will help ensure that your ads are highly relevant to the users who see them.
Use relevant and specific ad copy: Your ad copy should be relevant to the keywords in the ad group and should include specific details about your products or services.
Use different ad copy and landing pages for different ad groups: Each ad group should have its own unique ad copy and landing page to ensure relevance and a good user experience.
Use negative keywords: Negative keywords are words or phrases that you do not want your ads to be shown for. By including negative keywords in your ad groups, you can help ensure that your ads are only shown to users who are likely to be interested in what you have to offer.
Monitor and optimize performance regularly: Regularly check the performance of your ad groups, and make adjustments as needed. This can include testing different ad copy, optimizing bids, and adding or removing keywords.m
Use ad group level targeting options: Ad group level targeting options like geographic, device and ad schedule targeting can help you reach your desired audience and improve the performance.
Keep your Ad groups well structured: Make sure that you have a good structure in place for your ad groups, with clear and logical groupings of keywords and ads. This will make it easier to manage your campaigns and make changes as needed.

By following these ad group best practices, you can help ensure that your PPC campaigns are effective and efficient, and that your ads are shown to the right users at the right time.

What You Need to Know About PPC Budgets & Bidding

PPC (pay-per-click) budgets and bidding are important considerations when setting up and managing a PPC advertising campaign. Here are a few key things to know about PPC budgets and bidding:

Set a budget: Determine how much you are willing to spend on your PPC campaign. This will help you to manage your costs and make sure that you are not overspending on your advertising efforts.
Choose the right bidding strategy: There are different bidding strategies available for PPC campaigns, such as cost-per-click (CPC) bidding, cost-per-acquisition (CPA) bidding, and cost-per-impression (CPM) bidding. Each strategy has its own advantages and disadvantages, so it's important to choose the right one for your campaign.
Bid on relevant keywords: Make sure you bid on keywords that are relevant to your product or service. This will help ensure that your ads are shown to the most relevant customers and increase the chances of them clicking on your ad.
Use negative keywords: Negative keywords allow you to exclude specific keywords from your campaign so that your ads do not show up when those keywords are searched. This can help you to optimize your campaign and avoid wasting budget on irrelevant clicks.
Monitor and adjust bids: Regularly monitor the performance of your campaign and adjust your bids as needed. This can include increasing bids on high-performing keywords or decreasing bids on low-performing keywords.
Keep an eye on Quality Score: Quality Score is a metric used by Google Ads and Bing Ads to assess the relevance and quality of your ads, keywords, and landing pages. A higher Quality Score can lead to lower costs and better ad positions.
Analyze and Optimize: Keep analyzing your campaign data, check which keywords are converting and which are not, which ad copy works best, which time of day, day of the week, and geographic location is converting best. Use this data to optimize your campaign and get the best ROI.

By understanding PPC budgets and bidding, you can create and manage a PPC campaign that is effective, efficient, and aligned with your business goals.

What you should know about PPC Ad Targeting Options

PPC (pay-per-click) ad targeting options allow advertisers to target specific groups of customers based on various criteria. Here are a few key things to know about PPC ad targeting options:

Location targeting: Allows you to target customers based on their geographic location. This can include targeting specific countries, regions, cities, or even specific addresses.
Demographic targeting: Allows you to target customers based on their age, gender, income, education, and other demographic factors.
Keyword targeting: Allows you to target customers based on the keywords they use in their search queries. This can include targeting specific keywords or keyword phrases, or using negative keywords to exclude certain keywords from your campaign.
Behavioral targeting: Allows you to target customers based on their online behavior, such as the websites they have visited, their search history, and their interests.
Device targeting: Allows you to target customers based on the device they are using to access your ad. This can include targeting desktop computers, laptops, tablets, or smartphones.
Time targeting: Allows you to target customers based on the time of day and day of the week. This can include targeting specific hours of the day or days of the week, and can be used to reach customers when they are most likely to convert.
Remarketing: Allows you to target customers who have previously interacted with your website or ads. This can include targeting customers who have visited your website, abandoned a shopping cart, or viewed a specific product or page.

By understanding and using PPC ad targeting options, you can create and manage a PPC campaign that is more effective and efficient, and that reaches the right customers at the right time.

PPC Copywriting Best Practices

PPC (pay-per-click) copywriting is the process of writing ads for a PPC campaign. Here are a few best practices for PPC copywriting:

Be clear and concise: Use clear and concise language in your ad copy. This will help ensure that your message is understood by your target audience and increase the chances of them clicking on your ad.
Use a strong call to action: Encourage customers to take action by including a strong call to action in your ad copy. This can include phrases like "buy now," "learn more," or "get a free trial."
Include keywords: Include keywords in your ad copy that are relevant to your product or service. This will help ensure that your ad is shown to the most relevant customers and increase the chances of them clicking on your ad.
Use ad extensions: Ad extensions can help increase the visibility of your ad and provide additional information to customers. This can include site links, callouts, structured snippets, and more.
Test, test, test: Conduct A/B testing on different elements of your ad copy such as headlines, descriptions, and calls to action. This will help you to identify what works best and what doesn't and help you optimize your ad copy for the best results.
Make your ad stand out: Use the ad copy to make your ad stand out from the competition. Use unique selling points, special offers or any other elements that can make your ad more attractive to the potential customers.
Use a sense of urgency: Use a sense of urgency to push the customers to act fast. Limited time offers or stock availability are some examples of how to create a sense of urgency in the ad copy.

By following these best practices, you can write ad copy that is clear, compelling, and effective, and that helps to improve the performance of your PPC campaign.

Everything You Need to Know About Ad Extensions

Ad extensions are additional information that can be added to a PPC (pay-per-click) ad to make it more informative and engaging for customers. Here are a few key things to know about ad extensions:

Types of ad extensions: There are several types of ad extensions available, including:

Sitelinks: Allows you to add additional links to specific pages of your website.
Callout: Allows you to add additional text to your ad that highlights specific features or benefits of your product or service.
Structured snippets: Allows you to add additional information to your ad that highlights specific features or aspects of your product or service.
Call: Allows you to add a click-to-call button to your ad that allows customers to call your business directly from the ad.
Location: Allows you to add your business address and a map to your ad.
App: Allows you to add a link to your app in the ad.
Ad extension can increase visibility: Ad extensions can increase the visibility of your ad by taking up more space on the search engine results page, which can make your ad stand out from the competition.
Improve Ad's Performance: Ad extensions can also improve the performance of your ad by providing customers with more information and making it more likely that they will click on your ad.
Ad extension can be scheduled: Ad extensions can be scheduled to run only during specific days and times, which can help you to reach customers when they are most likely to convert.
Monitor & Optimize: Regularly monitor the performance of your ad extensions and make adjustments as needed. This can include disabling underperforming ad extensions or adjusting settings for specific ad extensions.
Test: Conduct A/B testing on different ad extensions and configurations. This will help you to identify which ad extensions work best for your campaign and how to optimize them for the best results.

By understanding and using ad extensions, you can create ads that are more informative and engaging for customers, and that can improve the performance of your PPC campaign.

Digital Advertising Law

Digital advertising is subject to a variety of laws and regulations that govern how ads can be created, placed, and tracked. Here are a few key areas of law that are particularly relevant to digital advertising:

Truth in Advertising

The Federal Trade Commission (FTC) enforces laws that require advertisements to be truthful, not misleading and backed by evidence. The FTC can take action against advertisers that make false or misleading claims in their ads.

Data Protection and Privacy

The General Data Protection Regulation (GDPR) and the California Consumer Privacy Act (CCPA) are two examples of laws that govern how companies can collect, use, and share personal data. Advertisers must obtain consent from users before collecting their data and must provide them with clear information about how their data will be used.

Children’s Online Privacy Protection Act (COPPA)

This law regulates the collection and use of personal information from children under the age of 13. Advertisers must obtain verifiable parental consent before collecting personal information from children under 13.

CAN-SPAM Act

This law regulates the sending of commercial emails. Advertisers must include accurate sender information, a clear and conspicuous opt-out mechanism, and must honor opt-out requests promptly.

Intellectual Property

Advertisers must respect the intellectual property rights of others and not use copyrighted or trademarked material in their ads without permission.

Native Advertising

The Federal Trade Commission (FTC) requires that native ads are clearly and prominently labeled as sponsored or promoted content.

Ad Tracking and Retargeting

Laws like GDPR and CCPA have specific regulations around ad tracking and retargeting, including the requirement for user consent.

By understanding and complying with these laws and regulations, advertisers can ensure that their digital advertising efforts are legal and ethical. It’s important to note that laws and regulations can vary by country and region, so it’s important to consult with legal counsel before launching a digital advertising campaign.

Conclusion

If you made it up to this point congratulation you’re right on your way to becoming a PPC ad campaign enthusiast. I want to believe this guide provided everything you’ll need to launch your PPC campaign.

Whether you started your business yesterday or have been in operation for decades, PPC may be the boost you need to gain an advantage over your competitors or at least rank higher in the SERPs.

Applying the information in this guide about creating a PPC campaign and the best practices for a quality PPC strategy will get you well on your way to increasing the traffic and conversions to your website.

If you found this article very informative feel free to comment or share it on your favorite social media platform.

Table of Content

What is a PPC Ad Network and 5 Best PPC ad Networks