Google Analytics
Google Analytics (GA) is a free service offered by Google that generates detailed statistics about the visitors to a website. GA will analize all visits your site receives and record things such as where the visitors came from, how long they stayed on the website and their geographical position.
Users can define and track conversions, or goals. Goals might include sales, lead generation, viewing a specific page, or downloading a particular file. By using this tool, marketers can determine which ads are performing, and which are not, as well as find unexpected sources of quality visitors.

Every website designed by Teleostec comes with the neccessary code to enable you to track the performance using this service.
More information can be found about Google Analytics by visiting their website.