Facebook Messenger is a cross-platform messaging app that allows users to communicate with each other. The app is available for iPhone, iPad, Android, Windows Phone, and BlackBerry devices. Messenger offers text chat, voice and video calls, group chats, and sticker packs. It also allows users to share their location with others.
The protocol of Facebook Messenger is simple: when you open the app, you are automatically logged in with your Facebook account. You can then view your list of friends who are also using the app and start chatting with them. If you want to add someone as a friend on Messenger, you will need to search for their name or phone number in the search bar. Once you find them, you can tap on their name to start a conversation.
If you're having trouble understanding the protocol of Facebook Messenger or have any questions about the app, feel free to reach out to us in the comments section below!