Users also can set specific videos for either public viewing, friends-only viewings, or private viewing that they share in a post regardless of whether it is made by an account set as 'private'. For example, the user may allow specific users or only their 'friends' to comment on their posts and send messages. Users can choose who can interact with them through the app. Note that the default setting is set to public. Public profiles remain visible until switched to private status manually. The app also allows users to make accounts private if desired so that only TikTok-approved followers will be able to view your content. Users also get messages via direct messaging, which allows them to send emojis as well as video clips of themselves. Users also have the ability to save their favorite songs, hashtags, filters, or sounds for future use in different posts by accessing them from an easy-to-find 'Saved' section on each profile page that only appears when they're logged into TikTok. They have the option of posting when ready and then editing videos at any time by tapping on 'Edit', which is located next to where you posted last. When people are not ready to share a video just yet, they can store it in their drafts. TikTok has another trademarked function called ' Duet' where two people can be filmed while singing together - much like Musical.ly did before being bought out by TikTok. They can do this by using the app's ' React' feature, which allows them to film themselves reacting over the video in an adjustable window that is movable around their screen. In addition to filming a video, users can also react or sing along with one. Only videos featuring 16+ people will show up under the 'For You' page to protect underage users. If you're not interested at all in any given video, then clicking ' not interested' will essentially filter out everything else related as well. These recommendations then allow users who like this kind of stuff to find similar TikToks without having to scroll through endless pages or posts themselves. The AI on TikTok follows user activity to learn what type of content they enjoy before recommending it in their feed, including anything from short videos and memes to longer clips. The ' For You' page is one of its most popular features. You'll even be able to edit the song using speed adjustments before uploading for all friends and followers. To make videos more interesting, you can choose background music from any genre or use the sound on top of it by recording lip-sync videos to popular songs. TikTok is a mobile app that allows users to create short videos with filters and music from their own devices.