What is the “reservation” function?

In the updated MOL Bubi system, you can reserve bikes. You can reserve a maximum of two bikes at a time with one account. Whilst a bike is reserved, other users cannot hire it. The reservation period lasts
for a maximum of 10 minutes, after which the bike automatically becomes available again. Please only reserve a bike if you actually intend to use it. If you no longer need the bike you have reserved, you can cancel the reservation within the app, making the bike available to others.