► 'Good at' informs someone what you excel at and are comfortable doing.

Let's see some examples:

1. I am good at drawing.
2. I am good at video games.
3. I am good at swimming.
4. I am good at driving.
5. He is good at reading.
6. He is good at sports.
7. He is good at writing.
8. I was good at math.
9. I was good at dancing.
10. He was good at chess."