On September 7, 1998 Google became incorporated and moved to its first office. In three years the Google was conducting more than 200 million searches a day. The founders of Google made it the company focus to refine and create the perfect search engine that "understands exactly what you mean and gives you back exactly what you want." Additionally, with a strict focus on infrastructure Google configured thousands of linked PCs into one of the worlds largest Linux clusters to revolutionize quick searches. This focus of creating a more efficient search engine is a standard that has all other search engine companies scrambling to catch up.
Google spiders the web to maintain its own index, they place an emphasis on content and link popularity. One factor that determines your rank on Google is the number of links that point to your site, the quality (popularity) of the sites that link to your site, the text in and around the links that point to your site, and who you link to. They also maintain their own PPC listings.
They provide their free content to AOL search, Netscape and Iwon. They also provide portals with their own PPC listings AdWords.