How Search Works

How Search Works

>> CUTTS: Hi, my name is Matt Cutts. I’m an engineer
in the quality group at Google and I’d 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 aren’t
actually searching the web, you’re searching Google’s 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 fetching a few web pages then they follow the links on those pages and fetch
the pages they point to, and follow all the links on those pages and fetch the pages they
link to and so on, until we’ve indexed 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. I type in my search, say, cheetah running speed and hit return. Our software
searches our index to find every page that includes those search terms. In this case,
there are hundreds of thousands of possible results. How does Google decide which few
documents I really want? By asking questions–more than 200 of them. Like, how many times does
this page contain your keywords? Do the words appear in the title, in the URL, directly
adjacent? Does the page include synonyms for those words? Is this page from a quality website
or is it low quality, even spamming? What is this page’s PageRank? That’s a formula
invented by our founders Larry Page and Sergey Brin that rates a web page’s importance by
looking at how many outside links point to it, and how important those links are. Finally,
we combine all those factors together to produce each page’s overall score and send you back
your search results about half a second after you submit your search. At Google, we take
our commitment to delivering useful and impartial search results very seriously. We don’t ever
accept payment to add a site to our index, update it more often or improve its ranking.
Let’s take a look at my search results. Each entry includes a title, a URL and a snippet
of text to help me decide whether this page is what I’m looking for. I also see links
to similar pages, Google’s most recent stored version of that page, and related searches
that I might want to try next. And sometimes, along the right and at the top, I’ll see adds.
We take our advertising business very seriously as well, both our commitment to deliver the
best possible audience for advertisers and to strive to only show ads that you really
want to see. We’re very careful to distinguish your ads from regular search results and we
won’t show you any ads at all if we can’t find any that we think will help you find
the information you’re looking for–which, in this case, the cheetah’s top running speed
is more than 60 miles an hour. Thanks for watching, I hope this made Google a little
bit more understandable.

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58 Replies to “How Search Works”

  1. Dammit, I would like to write something as:"He even not found speed of gepard " but he say 110 km/s…

  2. Dear Google
    A lot of thanks to you
    For helping us and educating us in the most simpler form and that too FREE
    Now knowing has become so easy
    Expressing has become so easy
    Now we have our own world full of opportunities and gateway inside the room that helps us to explore outer world and prepare ourself accordingly
    No info is restricted anymore
    Google helps you in how to use Google products in the most simpler way
    A lot of thanks 😊

  3. Google trusts noone, they cannot..
    Its nature of business..

    But Google screwed lot of authenticate legal businesses in India for same..

    Had word with Matt on hangouts..


    #Amazon etc. there is HUUUGE LIST, Matt ?
    They are served on top regardless of your algorithms

  4. Good Video. When someone searches, Say " Moon Mission India' , Google should 1st recall this searche's history- i.w. 'Was it searched earlier ' , what was the result – has some additions been made to it, now.
    2. 'gmail' is used by many many people. and sometimes, we need to delete some e-mails. the method now is to tick the box/boxes and then ' delete' them
    Can GOOGLE do this – when we hover the cursor over a gmail sender, google should display the number of e-mails from that sender – just by looking at the number of e-mails sender – we can delete the emails from a sender with more number of e-mails. -> This could be very useful.

  5. youtubegoogle are taking the words we type giving us appeasement headlines user content ….through all the media …..appeasing us appeasing us appeasing us….. so we wont rise up and demand they pay taxes…..

  6. Google rocks 😇😇😇

    Keeping the Faith 🙏🙏🙏

    Everything happens for a reason 🙏🙏🙏

    Everything happens in God's time and God is always on time 🙏🙏🙏

    Keeping it real 🙈🙊🙉

    Living on a dime $$$

    God bless America 🙏🙏🙏

    I believe in God's Miracles ! 🙏🙏🙏

  7. Got here by searching for "Twiddler"… Why don't you go ahead and tell people about the rampant censorship at Google? We know.

  8. Unser Land ist verzaubert ich bin verzaubertet ich bin ein Terroropfer alles durch klonen und vodoo deshalb geht nix weiter

  9. On ads. I made a purchase. Now I get a lot of ads for the same item. Well, dah, I already purchased the item! Too many pop ups. I waste time clicking the X's to attempt to see what I am trying to look up. Think pinterest is real bad. Also trying to find a food recipe.

  10. The internet has already begun to change the world, my generation is the first generation that kinda grew up with the internet, its made learning so much easier, last year 1/3 of people who got married in US met online, more people bought gifts online than from brick and mortar stores, no longer is all the news, movies, and entainment in the hands of a few, anyone can broadcast anything to millions of people, its even changed things politically the Arab spring was organized threw facebook. The internet is already sparking the imagination of the next generation and helping them grasp ideas that might help us all one day.

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