Facebook is a social tool for connecting with friends. People can use it to keep interacting with friends, colleagues, classmates and people around them, share unlimited uploaded pictures, post links and videos.

Facebook is the world's largest social media network with a very large number of active users. Facebook is not only an efficient source of traffic and an efficient interactive platform, but also an efficient brand promotion channel and an efficient marketing tool.

The wall is the message board on the user's profile page, now upgraded to a timeline. Other users who have the right to view a particular user's full profile page can see that user's wall. Messages on a user's wall are also exported in a Feed. Many users leave messages through their friends' walls. More private communication takes place through "Messages". Messages are sent to the user's personal mailbox, just like email, and are only visible to the recipient and sender.

Facebook offers a "Poke" feature that allows users to throw a "poke" at someone. According to the Facebook FAQ, "Poke is a way for you to interact with your friends. When we designed this feature, we thought it would be cool to offer a feature with no clear purpose. Users have their own interpretations of Poke, and we encourage you to come up with your own." In reality the purpose of this feature is simply to allow users to get the attention of other users.

Facebook remains the largest social platform in the U.S., with 160 million mobile users accessing the Facebook app in September 2019. The MAU from Facebook is still growing in the last decade, but it has shown a slow growth trend since Q3 2017. We found that "watch videos", "see pictures", "share content to everyone" and "share content to a single person " are far ahead of the rest. In terms of content, "pictures" and "videos" are still the most popular. In terms of behavior, most users mainly "watch" and "share". In terms of content, the product concept is clear, so users can clearly understand what the product can achieve and what content should be shown here. The content is mainly UGC, including but not limited to pictures, videos and motion pictures. From the scene, help users to solve the pain point of specific life scene communication, such as family, games, interests, etc. Today we are all used to actively sharing photos and text to our friends, but when Facebook launched this feature, it caused widespread controversy, focusing on the issue of "privacy", users thought that how can I let others see what I posted. Users kept questioning and protesting, but they couldn't help but continue to use it, so Facebook added initial privacy controls, such as hiding their own updates, and NewsFeed persisted. facebook saw through the inner workings of users' "mouths that say no, but bodies that are honest". Facebook has seen through the "honest body" of users who say no.