Facebook’s search history tracks what you have been looking for. And this is great for you. But ultimately, Facebook is a private matter. So make sure that you keep it that way. So if you wish to risk people seeing who you’ve been looking up, only then don’t clear the search history. Here’s how you can do that easily. Open the Facebook app and click on the search icon to answer how to delete search history on facebook app. Then select “Edit.” Finally, choose “Clear Searches, “instantly clear your history.