We've all probably commented on a post and regretted it later because of the onslaught of notifications that followed from other people commenting. 

You may not know that you can unsubscribe from activity on any post, which could be a godsend next time you decide to comment on a friend's politically charged opinion.

When you get a notification for a comment or like on a post on Facebook's desktop site, click the "X" to the right of the notification and then "Turn off."

The reverse is also true. You can turn on notifications for activity on any post from the right drop-down arrow.