1) Google was founded in 1995 by Larry Page and Sergey Brin. It introduced its search engine in 1998 and later introduced AdWords in 2000 and AdSense in 2003 to monetize its services.
2) Google's business model centers around AdWords, AdSense, and DoubleClick which allow advertisers to bid on keywords and publishers to display relevant ads, generating revenue for Google.
3) Google's success factors include its people like Page, Brin and Schmidt, its innovative business model combining search and advertising, and strong branding around its name.