How Google Search Works?

Well known Google Engineer Matt Cutts demonstrate on How Google Search Engine Works.

Matt Cutts state that in order to bring your website/blog on top of search results, your site must contain unique search terms on your pages so that the big G will read that and put on the snippets. Google gives too much importance on the quality of the content that's why search engine optimization people do on page optimization in their websites because Google search engine bots/spiders love the good structure of the website.