How Search Works


When you do a search on Google you are not searching the web; you are searching Google’s index of the web. The index is created with programs called spiders that follow the links they find to build a picture of the content of the web.

When you do a search there might be many thousands of pages with related information but how does Google decide the ones required. Search – Google asks a number of questions including:

  • How many times does the page contain the keywords?
  • Do the keywords appear in the title?
  • Do the keywords appear in the URL?
  • Are the keywords directly adjacent?
  • Are there synonyms for those words?
  • Is this page on a quality website or is it low quality?
  • What is this page’s PageRank? PageRank is a formula invented by the Google founders Larry Page and Sergei Brin that rates a webpage’s importance by looking at how many outside pages point to it and how important those links are.
  • Finally, we combine all those factors together to determine each page’s overall score and send you back your search results about 0.5 seconds after submitting your search.
  • Google is committed to providing useful and impartial search results.
  • No payments can be made to influence the results.
  • The results page includes the PageTitle and a snippet of text to assist searchers finds the information they are after.

Matt Cutts – March 2010

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