Google Analytics has been available since 2005. It shows high-level, dashboard-type data for the casual user, and more in-depth data further into the report set.
Google Analytics analysis can identify poorly performing pages with techniques such as funnel visualization, where visitors came from (referrers), how long they stayed and their geographical position. It also provides more advanced features, including custom visitor segmentation.
The facility is free and even if you do not use the data straight away it is useful to have it installed on your site in case you need that data at a later date.
Webscaping can set up the coding for you and the Google tool will monitor the visits to your site and give you an indication of how many people are looking at it, where they live and the average time they spend looking at your site.