Open Facebook and log in
Tap the menu icon
Go to Settings & privacy
Tap Settings
Open Activity log
Select the activity you want to delete
Tap the three dots next to the item
Tap Delete or Move to trash
Confirm the deletion
To delete search history, open Activity log
Tap Logged actions and other activity
Tap Search history
Tap Clear searches
Confirm
To delete watch history, open Activity log
Tap Videos you’ve watched
Select the items
Tap Delete
Confirm
To delete post history, go to your profile
Find the post
Tap the three dots
Tap Move to trash or Delete
Confirm
To delete comments, open Activity log
Tap Comments
Select the comment
Tap Delete
Confirm
To delete likes and reactions, open Activity log
Tap Likes and reactions
Select the item
Tap Remove
Confirm
To delete messages, open Messenger
Open the chat
Press and hold the message
Tap Delete
Confirm
To delete all activity, use Activity log filters
Select All time
Delete items one by one or in batches
Repeat for each category you want removed