How many times have you been in a situation where you are being sold to? I can think of at least 50 in just the past week:
What I’ve found is that I’m much more likely to buy if the salesperson knows the product or service backward and forward. If they start hesitating or have to check with others for answers I get skeptical.
Bottom line: if you want to sell more, really get to know what your selling so you can answer pretty much any question that may come up!