I own a small business and what I would like to do is find an expert to consult about effective banner advertising. I can hire a graphics designer, and I have, several times, but that's not what I'm looking for. I'm not looking for someone who needs me to tell them what the banner should say. I'm looking for someone who can examine my product and figure out what the banner should say, an expert in this type of work. I'm not even sure where to begin my search. Is this called visual communications? Or is this type of thing more in the marketing field? And where should I look to find such an expert?
Sorry, I know this may be a pretty open ended question to some of you, and inevitably someone is just going to point me to Google. If I knew what to look for, I probably wouldn't be here asking :).