Why do Amazon.com pages tend to rank well for product queries?

Search for a physical product usually ranks Amazon #1, even though it may not provide the best user experience. What is being done to prevent large corporations from dominating search engine results? Steve K, Pennsylvania Have a question? Ask it in our Webmaster Help Forum: www.google.com Want your question to be answered on a video like this? Follow us on Twitter and look for an announcement when we take new questions: twitter.com More videos: www.youtube.com Webmaster Central Blog: googlewebmastercentral.blogspot.com Webmaster Central: www.google.com