Getting traffic to your site is one thing - and there are hundreds of ways to do that - but once the visitors are there, are you making the most of their visit? Google Analytics can tell you how long visitors spend on a page, and they can tell you how many of your visitors completed a purchase, or signed up for your newsletter, or requested a quotation - or whatever it is you want them to do once they get to you. But is your site working as well as it might?..