What does a green arrow signal mean?

A green arrow signal is a clear indicator that you may proceed in the direction of the arrow safely. This means that when you see a green arrow, you have the right of way to continue your movement, whether that involves turning or going straight, depending on the direction indicated by the arrow. It is a signal that indicates that the intersection is clear and there are no obstructions or traffic conflicts in that direction.

Offering context on other choices, the option that suggests to prepare to stop would indicate a yellow light, which serves as a warning to slow down. The suggestion to yield to pedestrians is important but specifically applies in scenarios where you might need to give way to foot traffic, which is not the primary mandate of a green arrow. Lastly, the indication of 'turn right only' would be misleading since a green arrow can also signal left or straight movement, depending on the configuration of the traffic signal. Thus, a green arrow provides a clear and affirmative instruction to proceed confidently in the direction it points.