If you allow instant bookings, a guest can book your Space directly and definitely without any request. You must keep the calendar up to date.
In the calendar settings you can synchronize the Workspace2go calendar: Calendar Synchronization.
In the calendar settings you also have the option to set minimum time in advance for instant bookings. This allows you to specify up to how many hours before the start of the booking a guest can make an instant booking. If the guest is later, he/she can only send a request which you can answer.
Tip: You will receive the booking confirmations by e-mail. Set your smartphone to receive push messages for e-mails so that you are immediately informed about the bookings.