Why do I keep getting a 'low coolant level' warning in my Audi A1?

I have a 2015 Audi A1 and I keep getting a warning on my dashboard about low coolant level, even though I just had it topped up recently. What could be causing this and should I be worried?

Low coolant level warnings can be caused by a variety of issues, including a leak in the system or a malfunctioning sensor. It's best to have a mechanic diagnose the exact cause so it can be properly repaired.