Blinkers are crucial for safe driving, signaling your intent to other drivers. She used her blinker before merging into the next lane.
Pro Tip 2/3
Direction Specific
There is a left and right blinker, each for signaling the respective turn direction. He activated the right blinker to show he was turning right.
Pro Tip 3/3
Alerting Others
Blinkers communicate your actions to pedestrians and other vehicles to avoid accidents. At the intersection, the driver used the left blinker to alert pedestrians.