From ROI Products:
AI solves 3 real problems: 1. Man years are wasted putting code into pages, only to have to be repeated as the Web site changes. 2. No one can be 100% perfect, so some pages end up mis-tagged with errors that may affect the site, and will affect the Web analytics figures. 3. It is often difficult and sometimes impossible to ensure you have tagged every single page on a Web site even if you are using databases and templates.