Bike rental is, as the name suggests, any business that rents bikes during a short time for a price. Most bike shops also have a rental service though there are exclusively rental places as well.
Bike rental caters to people that don’t posses their own vehicle, particularly tourists. Therefore, you can find bike rental on tourist hotspots such as beaches and public parks. Their rental is meant to be usually for a couple of hours and staying at the location.
Some bike rental shops also offer bikes hourly, daily, and weekly. These models cater mostly to sports tourists and professionals rather than to the average tourists.