Parallel parking is a driving maneuver in which a vehicle is parked parallel to the side of the road, with one wheel on the curb. This type of parking requires the driver to angle the car into a space that is typically narrower than a standard parking spot, while also ensuring that the car's wheels are aligned correctly and that there is enough room for other vehicles to pass by. It can be challenging for some drivers, but with practice and patience it becomes easier over time.