The document discusses the history and business model of Google's paid search platform. It describes how Google was founded by Sergey Brin and Larry Page after developing a search algorithm in the 1990s. Today, Google and a few other major companies dominate the search engine market. Google uses a pay-per-click model for paid search ads and a quality-adjusted auction system to determine ad rankings and prices that balances user, advertiser, and Google's own interests.