What is the purpose of the Audi 80's oxygen sensor?

I am trying to understand how the oxygen sensor works and why it is important for my Audi 80's performance. Can someone explain it in simple terms?

The oxygen sensor in your Audi 80 helps measure the amount of oxygen in your exhaust and sends this information to the engine's computer. This allows the computer to adjust the air-fuel mixture, ensuring your engine is running efficiently and reducing harmful emissions.

Think of the oxygen sensor as your car's internal air quality monitor. It constantly checks and regulates the amount of oxygen in your exhaust to optimize your engine's efficiency and ensure it meets environmental standards.

The oxygen sensor is crucial for keeping your Audi 80's engine running smoothly. It not only helps improve fuel economy and reduce emissions, but it also protects your engine from damage that can be caused by running too rich or too lean.