What is the purpose of the Audi A5's engine oil dipstick?

I've noticed a dipstick in the engine bay of my Audi A5, but I'm not sure what it's for. Can someone explain its purpose and how to use it correctly?

The engine oil dipstick is used to check the level and quality of the engine oil. You should regularly check it to ensure your engine is running smoothly and to prevent potential damage.

To use the engine oil dipstick, park your car on a level surface and let the engine cool down. Then, pull out the dipstick, wipe it clean, and insert it back into the oil chamber. The oil level should be within the marked area on the dipstick.