Facebook Messenger is the messaging app that lets you send texts, photos, and videos to people on Facebook. Whether you're chatting one-on-one or in group conversations, understanding how the app actually works helps you use it more effectively and know what's happening with your messages behind the scenes.

These guides explain how to send and receive messages, what the different status indicators mean, how your conversations are stored, and what privacy settings you have available. You'll learn how read receipts work, why messages sometimes fail to send, and what happens to your data when you delete a conversation.