Why is it important to regularly change the timing belt on an Audi 80?

I've heard that Audi 80s have a recommended timing belt change interval, but I'm not sure if it's necessary. Can you explain why it's important and what could happen if I don't change it regularly?

The timing belt plays a crucial role in the engine's function, as it controls the timing of the engine's valves. If the timing belt breaks or becomes worn, it can cause serious damage to the engine, resulting in costly repairs.