But if that post gets popular and the conversation blows up, or maybe you’re simply not interested in it anymore, you can stop these notifications. If you’re on a Mac or PC and the post is in your News Feed, click the carrot menu in the upper right and choose “Stop Notifications.” If it’s something like a photo that opens in a lightbox viewer, a “Stop Notifications” option appears among the “Like, Comment, Share” links.
If you’re on a mobile device, a carrot menu at the top right of the post also has a “Stop Notifications” link.