About Google

Google began in January 1996, as a research project by Larry Page, who was soon joined by Sergey Brin, and two Ph.D. students at Stanford University, California.

Google is the largest search engine on the web.

Google receives several hundred million queries each day through its various services.

Google maintains a 57 percent share over competing search engines Yahoo (23.7 percent); Microsoft (10.3 percent); Ask (4.7 percent); and Time Warner including AOL (4.5 percent).

Source: http://searchenginewatch.com/showPage.html?page=3627654

Not all Googles are the same! Yes, Google does at times agree to country-specific censorship.

When you query, Google returns web pages. These pages come from Surface Web. However, there is unreached portion of the web. That portion is called Deep Web.

Source: http://www.lib.lsu.edu/instruction/deepweb/deepweb-print.html