What is the primary purpose of using turn signals while driving?

Using turn signals while driving serves the primary purpose of communicating your intentions to other drivers on the road. This communication is crucial for maintaining safety and ensuring smooth traffic flow. When drivers use turn signals, they indicate their upcoming maneuvers, such as turning left or right or changing lanes. This helps other motorists anticipate your actions and adjust their driving accordingly to avoid potential collisions.

The other options do not align with the safety and regulatory reasons for using turn signals. Showing off your car, entertaining passengers, or increasing speed are not relevant to the function of turn signals and can actually lead to dangerous driving behavior. In essence, the appropriate and responsible use of turn signals is vital for effective communication, which in turn contributes to overall road safety.