The name "Google" is a play on the word "googol." The creators of Google, Sergey Brin and Larry Page, came up with the name for what would become the largest search engine on the Internet.
Googol is a mathematical term for a specific number that is written out as the numeral 1 followed by 100 zeros. According to Brin and Page, the theory behind selecting a name based on this extremely large number is to reflect the mission of Google to organize a potentially infinite amount of information on the Internet. Google.com was registered as a domain name on Sept. 15, 1997.