You are optimizing your website on Google, and you wish to know how Google crawls a website or blog ?. Understanding the state, you easily to optimize your site on Google and another search engine.
To know exactly how Google crawls or index one website you can find out more about a tutorial of Google about Google crawling and indexing.
Quicksprout has display one infographic which described how Google can indexing or understanding the website. You can look for more infographics here.
You can see the explanation of Matt Cuts by video below: