For lots of golfers, choosing their coach is as simple as going with the resident pro at their club. There is nothing wrong with this method, but it is important that you are working with someone that is genuinely helping your golf game improve.
You need to be able to understand the language your coach uses, the drills they employ and how to execute them. But above all else is their tuition actually improving your game? If not then it might be worth trying out a new coach. Mark Crossfield discusses all of the above and how to find the coach you need.