TikTok is being named the most popular website of 2021. Web security company Cloudflare has released its annual ranking of the most-visited websites, and their data shows TikTok passing up Google to be the most popular domain. Google is number two this year, followed by Facebook. TikTok has also passed up Facebook as the most popular social media site. Coming in at number three this year, according to Cloudflare, is YouTube, followed by Twitter, Instagram and Snapchat.