Google Analytics is a website traffic tracking program. The tool is free of charge, loaded with features, and an excellent choice for most website owners. If you are not familiar with the service, you should take some time to explore the tutorials Google offers, as fluency with the tool can be of great benefit to your SEO efforts. With Google Analytics on your site, you can track site visitor activity and discover where they came from, how long they spent on the site, and what they looked at on your site.
Worst nightmare for a website administrator ?
-- Site administrator password is broken and intruders got in and messed up site terribley or worst, made a backdoor.
How to rescue ?
-- Simple. Choose a difficult to guess password. :)