There has been some confusion recently about which one should be used so I hope I can clear it up for you.
We use watch for things that are moving or events where people are doing things.
I will watch a baseball game at Koshien stadium this weekend.
I watched 'ItteQ' on TV last Sunday.
We use see when we are talking about the sense of sight. When we can naturally have vision of something.
I can see the ocean from my room and it's beautiful.
Can you see the ocean from your room?
We use look when we are talking about paying attention to what we see. We look at something intentionally.
I will look at your work in a minute.
Can you look at this paperwork and tell me if it's correct?
I hope this helps!