Facebook’s “Snooze” button allows users to mute people, Pages, and Groups for 30 days. This is beneficial if you find someone’s posts very annoying, but do not want to unfriend them for whatever reason. Snooze also allows Pages and Groups to retain less-active users that would otherwise unlike a page or leave a group.
Once the 30 days are up, Facebook notifies you in case you want to put them to sleep again.