Web Analytics gives you rich insights into your website traffic and internet marketing effectiveness.
Off-site web analytics refers to web measurement and analysis.
On-site web analytics measure a visitor's journey once on your website.
There are two main technological approaches to Web Analytics. The first method, logfile analysis, reads the logfiles in which the web server records all its transactions. The second method, page tagging, uses JavaScript on each page to notify a third-party server when a page is rendered by a web browser.