Most of our sites at work use Google Analytics but to be honest, none of us knows much about it at all. It's about as much use to us as a chocolate teapot. We presume our clients do understand what it tells them. But from time to time we get asked to put other analytics code into certain pages, which means they're paying for something they could most likely get for free because they don't understand it either. So I thought some education might be useful.