Why does my Audi A2 engine make a knocking sound?

I've noticed that my Audi A2's engine makes a knocking sound when it's running. It's not a constant noise, but it happens every few seconds. Is this something I should be worried about or is it normal?

Hi Samantha, a knocking sound from your engine could be a sign that there may be an issue with your engine's internal components. It's always best to get it checked out by a mechanic to diagnose the problem and prevent any potential damage.