They're kind of like tutors, but with a twist! Coaches are...
Coaches don't just give answers to questions; they guide students through the learning process.
Think of it like a coach for sports: athletes don't go to the coach for the first time after a game, they train with the coach before even stepping onto the field. Even if they're already professionals and know what they're doing, their coach helps them to make small corrections before they become big problems.
Many students find that coming in before any assignments are due helps them get off on the right foot.