What are the most common causes of squeaky brakes in an Audi A5?

I recently purchased a used Audi A5, and I've noticed that my brakes are starting to make some squeaky noises. I'm wondering what the potential causes could be and if there's anything I can do to address the issue.

One common cause of squeaky brakes in Audi A5s is worn brake pads. As the pads wear down, they can start to make a high-pitched noise. It's important to have your brakes checked regularly and replace the pads when necessary to avoid further damage or safety issues.