These little crawlers most likely to your website and also "read it" in much the exact same method as a human does, entrusted to right, leading to bottom. What these robotics discover they bring back to the "mothership," the internet search engine database. If Googlebot discovers your site regarding kittycats, it will certainly report the site, its area (URL), its materials, etc. to Google's data source where it is kept. When someone after that does an explore Google for kittycats, Google wants to its own data source for search results page. This is what makes online search engine so fast. All the searches you do hire data already in the online search engine's data source, not from a brand name brand-new search of the whole web.