The quality and I like to talk today about what happens when you do a web search the first thing to understand is that when you do a Google search you are actually searching the web you're searching Google index of the web or at least as much of it as we can find we do this with software programs called spiders spiders start by touching a few web page then they follow the links on those pages and fix the pages they point to and follow all the links on those pages and fit the pages they linked to and so on until even text a pretty big chunk of the web many billions of pages stored across thousands of machines now suppose I want to know how fast a cheetah can run a type in my search say cheetah running speed and return our software such as our index to find every page that include those Search terms and this case there are hundreds of thousands of possible results Google decide which few documents I really want by asking questions more than two hundred of them like how many times does this page contain your key works do the words appear in the title and then you were out directly adjacent to the page include synonyms for those works is this page from a quality website or is it low quality even stamp what is this Pages pagerank that's a formula and then it by our Founders Larry Page and Sergey Brin webpages important by looking at how many Outside Lands point to it and how important those things are finally we can buy and all those factors together to produce each Pages overall score and send you back your search results about half a second after you submit your shirt Google we take our commitment to delivering useful and impartial search results very seriously we don't ever accept payment to add a site or index update it more often or improve its ranking but take a look at my search results Sentry Foods the title that you were out and a snippet of text to help me decide whether this page is what I'm looking for also similar Pages Google most recent version of it and sometimes and advertising the best possible audience only want to see very careful with your ads from Regular Show you if we can't find anything will help you find the information you're looking for understandable