Scheduling tools send a confirmation email for every booking, and that email lands in the same inbox as everything else. A demo booked for tomorrow morning is easy to miss until the calendar reminder goes off.
A push notification for each booking means you can prepare for the call, and a cancellation reaches you while there is still time to offer the slot to someone else.
Who booked, which meeting and when, without opening your inbox.
The slot is free again, and the sooner you know the more likely you can fill it.
A request sitting unconfirmed is a lead waiting on you.
Worth a follow-up the same day, while the reason is still fresh.
Each of these sends the events above. Setup is the same for all of them.