In Facebook, the inbox is a feature that allows users to receive and send private messages to other users. It is similar to email, but it is through Facebook. The inbox contains messages that people have sent, any comments that have happened on your posts, and general engagement on your page. To access the inbox, users can click on the inbox icon at the top of the screen, which will give them a list of people who have sent them messages. Users can also access their inbox through the Messenger app on mobile devices or on the Facebook website on desktop. The inbox is different from notifications because it contains comments as well as direct messages and gives users an opportunity to engage back to them. The phrase "inbox me" on Facebook refers to the act of sending a private message to someone in response to their request.