You can either block somebody's account or set your profile to a "Private" account. By blocking somebody, they won't be able to interact with your profile in any way. To do so, go to the user's profile, tap on the three dots in the top right corner, and select "Block." Changing your account to a private one allows you to control who can follow you, and only your followers can see your posts. To change your profile to a private account, follow these steps: 1. Select the "three lines" in the top-right section of your profile page. 2. Go to "Settings" and then "Account." 3. Tap on "Switch to private Account."