# Message

> Learn how the Friends service handles player-to-player messages.

The message feature allows a user to send a message to a friend. This is not intended to be a full-fledged chat feature but rather a simple way of sending a notification to a friend.
For example, a developer could create and invite someone to a game by allowing a user to send an invite to a lobby, with the necessary information to join that lobby.

A message is only sent to users that have their availability as **ONLINE**, **BUSY**, or **AWAY**. The message must also be a serializable object.