A Fitting can vary from fitter to fitter. Most of the time you get what the above poster described. Some people fit statically, some fit dynamically.
Things to look for in a fitting-
Will you be hitting off of a lie board? This is the correct way to get your true lie angle.
How many combinations will the fitter use? The more the better. If they only have a few, then your really limited to what you even can be fit into. Some big companies have...