Welcome to WebmasterWorld Guest from 18.104.22.168
∑ report shows which search engine robots retrieved which pages on which days
∑ report to demonstrate potential problems, such as when particular pages are never indexed by any robot. With this information we can revaluate pages and optimize differently or can re-submit "problem" pages to specific search engines.
To clarify here analizes the logs, it is not a server side include or anything that looks at visitors real time.