With the Archived Chats folder in Messenger, users have a new way to keep their inboxes organized. This feature works similar to archiving an email in Gmail. Simply “swipe to archive” those inactive threads to keep your chat tidy, without deleting them completely (in case you want to reference them later). Want to view an old archived thread? Tap your profile photo and select Archived Chats for a full list of archived threads.

Messenger archived threads feature