Presence and awareness are two terms used, by different serverless WebSocket providers, for the same concept. They amount to users in a multi-user environment, like a chat app or multiplayer game, being aware of each other. We saw an example using presence to update user status in a multi-user game to let users know which players are available to play. Presence and awareness can similarly be used in a chat app, for broadcasting user status data or updating everyone when someone leaves.