Google Analytics

If you're not already using Google Analytics as a standard reporting suite for your website or your clients', more importantly. Why not? It's FREE! I've found the Analytics software so advanced and indepth that it's now one of the first things I set up before launching a website.
With such a multitude of reporting options, from GEO Mapping right through to setting up Funnels (the process of tracking a users steps around a website to a desired page or goal - eg. sales conversion or sign up). Google also provides all your standard stats like bouce rates, top content, time spent, hits, visits .etc

Google Anayltics was designed to be an extension to it's Adwords clients. It still is (although anyone can have it tracking their website). Users get the best results from Analytics by running an Adwords campain in conjunction, Google then tracks clicks, keywords, conversion rates & ROI to spit out some amazing data.

Wow, right? That's only just the beginning, the Analytics team have gone so far as to allowing you to tag all your other SEM campaigns from say, Yahoo. Plus tagging your interactive campaigns (like web banners), Google Analytics then tracks all your clicks and traffic, grabs it all together and then brings it into it's Analytics Reporting, so you can see your entire marketing campaign stats on a single page!! So stop messing about. Sign up for free with your Google Webmasters account.