Curbs are designed to keep vehicles from driving onto sidewalks and other areas where they are not permitted. They are often made of concrete or other hard materials and can be quite steep.
Driving up on a curb can put a lot of stress on your vehicle's tires, suspension, and frame. It can also damage the curb itself. If you must drive up on a curb, do so slowly and carefully and try to avoid hitting the curb directly.