User presence is a feature that lets you see who is online when you are logged in.
An avatar appears in the form header next to the users name, and in multiple other places such as team updates and messages. A dot on the avatar of the user represents online status.
A green dot means the member has been online within the past hour.
An amber dot means the member has been online within the past 8 hours.
No dot means that the member hasn't been online for at least 8 hrs.