Dott uses different zones where you can or cannot park temporarily or end your ride.
In general, you cannot end your ride in red zones. You can temporarily lock your Dott bike there to take a break or run some errands. In busy city centers there are special parking zones where you can temporarily lock your bike or end your rental.
If you go to the map in Gaiyo and select a Dott bike, or go to your active ride in the dashboard, you will immediately see the red and parking zones. There are also purple zones where you can temporarily park your Dott bike anywhere or end your reservation.