Tracking page viewing statistics
If you get 1000 hits a month on your homepage but absolutely no clicks on to your other pages then you know you need to improve the homepage appeal/design. Hint - Large call to action graphics and buttons really help with encouraging clicks!
Formulate a sales and e-marketing plan
The data you get from Google Analytics will allow you to see if any ‘Special offers’ banners are working, which pages are your most popular and where the site needs to improve it’s navigation.
Monitors visitors and users
See exactly how many people come to your website every single day and which pages they are going to. Analytics will tell you if you are receiving 100 hits a day or if you are struggling to get more than 5. It's great to compare the visitors you get against the number of enquiries.
Get in with Google
Google Analytics only works if you have a Google account and once you have an account with Google you can start looking at Google Places, Webmaster Tools and even Google+. Sign up to Google in every way possible and it can only help your site.