What are the extra buttons above the Favorites section in Teams?
There are several buttons in the top left part of teams, just above the favorites section. They purposes of these buttons is as follows:
- Mentions - clicking this will display all of the times you have been specifically mentioned in a chat.

- Copilot - this will give you access to Copilot, an AI tool by Microsoft.

- Unread, Chats, and Meeting chats - These are all different filtering options for your chat. For example, unread shows only unread chats, Chats only shows chats (no meetings), and Meeting chats only shows meetings.