Why is my Ford Focus making a grinding noise while braking?

I recently purchased a used Ford Focus and I've noticed that it makes a grinding noise when I brake. What could be causing this and how can I fix it?

The grinding noise could indicate worn brake pads. You should have them checked and replaced if necessary.

It could also be a sign of warped brake rotors. Have your mechanic inspect them and replace if needed.

Make sure to also check the condition of your brake calipers and have them replaced if damaged.