The Overview tab of your dashboard provides information about your domain usage:
Live sessions: number of video call sessions that are currently going on
Active participants: number of end-users in live sessions
Total sessions: number of video call sessions this month so far
Total participant-minutes: the total number of participant-minutes used this month
Included participant-minutes: each Daily plan includes a number of participant-minutes. This bar indicates how many of your included minutes you have used so far.
Rooms: the number of rooms in your domain. To stay within the limit of rooms allowed on your account, set an expiration parameter ('exp') when you create a room to make sure you don't accumulate unused rooms.