Which of the following describes a right turn bay's use?

A right turn bay's primary purpose is to facilitate safe and efficient right turns or to allow vehicles to slow down before making that turn. This designated area helps to separate vehicles turning right from the moving traffic behind them, thereby reducing the risk of collisions and improving traffic flow at intersections. By providing a space for vehicles to wait to turn without obstructing the through traffic, right turn bays enhance overall road safety.

The other options do not accurately describe the function of a right turn bay. Stopping to check your phone is inappropriate as it could create hazards, and parking in these bays is not permitted because they are meant for turning maneuvers. Additionally, right turn bays are not intended for overtaking, as this could lead to dangerous situations. Thus, the correct answer highlights the proper use of the bay for turning and the need to maintain traffic safety.