I can provide you with information about some of the top ad sites that were popular at that time. However, please note that the advertising landscape is constantly increasing, and new platforms may have emerged now. Additionally, the popularity of ad sites can vary depending on geographic location, industry, and target audience. Here are some of the top ad sites as of 2021: 1. Google Ads: Recently known as Google AdWords, Google Ads is one of the most popular and widespread advertising platforms. It allows businesses to create and display ads on Google’s search engine pages, as well as on various websites that are area of the Google Display Network. 2. Facebook Ads: Facebook offers a powerful advertising platform allowing businesses to target specific demographics and interests. With billions of active users, Facebook Ads is designed with a vast audience to reach potential customers. 3. Youtube Ads: Owned by Google, Youtube is the world’s largest video-sharing platform. Youtube Ads allow businesses to display video ads before, during, or after other videos, reaching an easy audience. 4. Instagram Ads: Owned by Facebook, Instagram is a highly popular social media platform, particularly among younger audiences. Instagram Ads allow businesses to promote their products through photo and video ads on users’ for. 5. Amazon Advertising: Amazon offers a range of advertising sources of sellers and vendors on its platform. where to advertise These ads can be purchased in search results and product detail pages, helping businesses promote their products on to Amazon buyers. 6. LinkedIn Ads: LinkedIn is a professional networking platform that gives various advertising sources of businesses to target a professional audience based on job titles, industries, and more. 7. Twitter Ads: Twitter offers an advertising platform allowing businesses to promote twitter updates, accounts, and trends to reach their target audience. 8. Pinterest Ads: Pinterest is a visual discovery platform, and businesses can use Pinterest Ads to promote their goods through pins and promoted pins. 9. Microsoft Advertising (formerly Yahoo Ads): Microsoft Advertising is a lot like Google Ads, offering search and display advertising across the Yahoo search engine and the Microsoft Audience Network. 10. Snapchat Ads: Snapchat is a popular messaging request among younger audiences, and businesses can leverage Snapchat Ads to reach this group through photo and video ads. Remember that the effectiveness of an ad platform can vary based on your business’s goals, target audience, and industry. Always do your research and consider your unique needs before investing in any advertising platform.