Facebook keeps a history of commenting or responding to messages posted by friends in the 'activity log'. But if you want, these information can be deleted from Facebook. To delete comment or response history, click on Settings & Privacy menu and press Settings menu again. If you come down a little and click on the Activity Log menu under the Your Information section, you will see various options.
Click on the comments tab to see your own comments. Now click on the three line icon in the right corner of the comment that needs to be deleted and press the Delete option. Similarly, likes and comments can be deleted by clicking on the Likes and reactions tab. In the same way, video data or search history viewed on Facebook can also be deleted.
