The Google Ads platform (formerly known as Google AdWords) allows you to run ads on Google, YouTube, Gmail, and the Google Display Network (GDN).
The Facebook Ads platform is based on audience targeting. With Facebook, you can target users based on their interests, demographics, location, and behaviors.
Over 2 billion people log into YouTube each month, so advertisers have a great opportunity to reach their target audience.
Business experts use promoted pins to promote their businesses on Pinterest, which has more than 200 million monthly users who explore new ideas and products every day.
Social media platforms such as Twitter are effective platforms for PPC ad networks. Businesses use Twitter to promote their products and services.
Microsoft Ads is another popular paid search platform. The Microsoft Ads network displays paid search ads across a number of search engines, including Bing, AOL, Yahoo!, and MSN.