The timeline is there to keep you on track to the time you and participants agreed to and give an overview of activities and important moments during the call and after.
The timeline will change from Blue → Orange → Red as the end approaches, to ensure you are keeping the meeting on track. All other participants will see a blue timeline throughout. 5 minutes before the end of the meeting, you will be prompted to extend the call.
The clock on the left shows the start time, and the one on the right shows the scheduled end time. The middle of the timeline shows the remaining time. Pressing the middle remaining time will change it to the current time or meeting title.
The timeline will show any events that occur throughout the meeting. Including when participants join and leave, reactions, your bookmarks and raised hands.