Googlebot is responsible for adding web sites to the organic search index of Google.com. He is but one piece of the Google organic search puzzle: Googlebot is the crawler, the index is master database of all pages know to Google, there is a PageRank calculation for each page in the index, there is a search algorithm that ranks pages for specific user queries. Googlebot is the Michael Jordan of web robots-- he routinely visits billions of web pages in search of new content, giving his bosses, Larry and Sergey, a significant competitive advantage in creating the world’s most popular search engine. Google.com delivers approximately 70% of the unpaid, organic traffic to websites.