Your profile is the outline of your face as it is seen when someone is looking at you from the side.

If you see someone in profile, you see them from the side.

A profile of someone is a short article or programme in which their life and character are described.

To profile someone means to give an account of that person's life and character.

If someone has a high profile, people notice them and what they do. If you keep a low profile, you avoid doing things that will make people notice you.