How Search Works


Written by:

>> 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.

100 Replies to “How Search Works”

  1. Beound Rea-litty says:

    Yes sir, it surely did..

  2. Elise M says:

    0:30 is that the TF2 2-Fort ambient noise in the intel room?

  3. Martin Oberrauch says:

    Liebes Google Team alles ist gesperrt auf dem Planeten auch bei den Nachrichten komme schon wiederholungen

  4. Martin Oberrauch says:

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

  5. Young Boy says:

    Can you help find service for Simcard put of phone

  6. baba barkati says:


  7. Gary says:

    How does your search compare to other search engines, let's say if I can't find something on yours?

  8. Gary says:

    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.

  9. poonam amrute says:


  10. Steve Fitness says:

    Absolutely love your content thanks google

  11. Av63PNT0 says:

    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.

  12. Donna Gregg says:

    Thank you.

  13. Buck Schneider says:

    How are u able to make your searches so fast when going through billions of pages

  14. big deezle says:

    Creepy mfers

  15. woravut lacharoj says:

  16. Wendy Powell says:

    How do I get all of my Facebook account and password if I for got how to get back in them.

  17. Śhreyäs Đëshmukh says:

    how information gets in those pages?

  18. TSMSnation says:

    see, this ones actually kind interesting.

  19. Jody Lowe says:

    Great explanations👍 thanks😀

  20. Jared Lim says:

    Is it true that Google stalks the user and then uses that information to place adds and cookies

  21. Optimus Phoenix Prime says:

    I'm a PooPoo snickle!😋

  22. Optimus Phoenix Prime says:

    💲👌🤑 you are searching hegemony + ads
    To understand search you must understand the brain
    mathematical sinusoidal waves.

  23. The Age of Anime / عصر الإنمي says:


  24. Georgios Markakis says:

    pr stuff

  25. Kanhu Telenga says:


  26. Shogo 昇剛 says:

    Imagine the hysteria if girls watched this video about spiders.

  27. Bar Steward says:

    you missed the part where you manipulate the results to suit your narrative, an honest mistake i am sure.

  28. jazzy hilario says:

    Thanks google!

  29. Mang AWAW Jahit says:

    Mantap !

  30. Seppe Zimmerer says:

    📲*00212645752301* *whatapps*📲
    وجـدت💁‍♂️ كــثــيــر مـن الــكــومــنــتــات عـن تـكـبـيـر الـقـضـيـب وضــعــف الانـتـصـاب وسـرعـة الـقـذف
    وأبـغـى أبـشـركـم😉 أنـي حـصـلـت عــلــى مــعــلــومــات كــثــيــر مـفـيـدة✅ هـتـنـفـعـكـم كـثـيـر ومــجــربــهــا شــخــصــيــا ونـفـعـتـنـي🤩🥳
    تــواصــل مـعـي🙋‍♂️ وأنــا بـشـرح لـك ســر الــوصــفــة الـواتـس اب *00212645752301*📲

  31. Lostmypen says:

    Ye and if i search "baby" google things im pregnant

  32. 郦枫 says:


  33. Beau Ellis says:

    I watched this in IT 🙂

  34. Antonio toni says:

    Google 9 years ago is so different from now…

  35. Tanvir Morshed says:

    I don't think google exactly shows the relevant topic as you search, as this video is claiming……they're specifically tailored to the person searching for what they search………I found different results when I'm logged in and not………..whether I'm searching from my devices (unambiguously mine) or not…….! So bragging about contextualization of spider driven impartial search results (the claim of this video) will not tame me…………. I expect impartiality from a company like Google, no matter what…….. no matter where I'm searching from…….Google be more Global!

  36. NATURAL VIDEO says:

    Google online home work job ?

  37. mathoholic teenager says:


  38. ? says:

    Google is like a library and everything on Google is a book

  39. Mark Esekielu Temaati says:

    I search for A Cheetah speed and Google just answer me after about 2 minutes

  40. Valerio Bertoncello says:

    Google as a whole company should be disintegrated or nationalized. Its social responsibilities in our modern society are too much for a single private, monopolist corporation.

  41. Anti Centrist says:

    I don't care what Google thinks is "quality" certainly, it should be a merit based system where the most clicked on links appear first.

  42. Them says:

    you literally just said they have to pass a 200 question personality quiz in order to earn top spots.

    according to merriam-webster:
    partial adjective
    par·​tial | ˈpär-shəl

    Definition of partial
    1: …
    2 : inclined to favor one party more than the other : biased


  43. Derek Bartlett says:

    Google search is terrible these days. Maybe update the video to show how shitty its gotten and how ads are more important than accurate search results.

  44. ace iimov says:

    have you noticed? google search doesn't have ads anymore… whaaaa???

  45. Rudra says:

    2:05 "We never accept payment to add your site to Google… "
    Nor do we ask your permission! 😘

  46. aman prasad says:

    google right now is not jst a search engine or provides free flow of information…… but its actually moulding the information According to there own terms….
    if uh see USA elections google actually hide all the criminal cases filed against the hillary clinton during the election….. but why if a person want to know about there senate to cast the vote he or she needs to know every positive and negitive aspects of there life sooo that they can choose better….. but thats not the case here.
    soo don't jst beleave the information shown to you search results bcz some if not most are sponsored pages.

  47. norbert nagy says:

    Why is google based on just 1 word? And if I write Zewa, why give Telenor out? And Rosmann Wellness has nothing to do with Zewa.

  48. Jeremiah Nihilo says:

    Now i want to know if he had ads and if so did he buy a cheeta ?

  49. Mohammed Adel says:


  50. Kurosakidude says:

    Too bad google is too dumb to understand that I don't want to see ANY kind of ads. Personalized or not.

  51. HorsePin says:

    Would be great if did a video how you rig search results like "Hilary clinton".

  52. Raymond Aung says:

    am sure google from 2016 > do ML Fairness by human intervention per google employees on tape.

  53. CRIMSONSKULL says:

    you didn't talk about how you store our data 🙁

  54. jesus christ says:


  55. Alan Clarke says:

    Short version: Whoever pays the most gets to add or remove whatever they want.

  56. William Su says:

    Google had to make this video cause congressmen/women have downs….

  57. Thsachemba Sangtam says:

    Progess understanding

  58. Mister Turk Turkle says:

    No ads. Sponsored content is spam

  59. كريم الخفاجي says:

    I know that all by myself

  60. Coenraad Loubser says:

    2:50 Blatant lie. = Evil. But I am sure this doesn't surprise anyone, it's just a sad testament to the human state. 🙁 But really, Google, do you have an internal department of integrity?

  61. David Josi says:

    google: we are very serious about only showing ads if they are relevent enough
    youtube: this person has done nothing but use youtube for the past 47 weeks straight, that means they like the outdoors

  62. Shubham Ambekar says:

    Ecosia is an Internet search engine based in Berlin, Germany, that plants trees by donating 80% or more of its profits to nonprofit organizations that focus on Reforestation. Ecosia considers itself a social business, is CO2-negative, claims to support full financial transparency, protect the privacy of its users; and is certified by B-Lab as a benefit corporation.The website maintains a running total of the number of trees planted. According to their website, as of 9th September 2019, the search engine had been responsible for the planting of more than 68 million trees.

    Ecosia uses 80% of its profits (47.1% of its income) from advertising revenue to support tree planting projects, the rest is put into backup reserves for unforeseen circumstances – if these reserves are not used they are channeled back into the company's tree planting fund. The company publishes its monthly financial report on its website.In October 2018, founder Christian Kroll announced that he has given part of his shares over to the Purpose Foundation.As a result, Kroll and Ecosia co-owner Tim Schumacher gave up their right to sell Ecosia or take any profits out of the company.

    How does Ecosia make money?

    Like any other search engine, Ecosia earns money from clicks on the advertisements that appear above and beside the search results.

    The advertisements on Ecosia are clearly labeled as Ads and are text links to websites that pay for each click by users. The ads are delivered to you by our partner Bing, who pays Ecosia a share of the revenue generated via these ads.

    Ecosia earns a few cents for every click on an ad from Bing – or a portion of the purchase price made through an affiliate link. Ecosia then gives the profits from this ad revenue to planting projects.

    We also make a small income on commission from our online store. All profits we receive go towards our projects – which means we can plant 20 trees every time we sell a t-shirt. 

    How much do you earn per ad click?

    How much we earn per click on an ad varies depending on the competition on the key word and the value of what is being advertised. Some search terms like "credit", "bank account" or "solar panel" come with more lucrative ads than, for example, "chocolate" or "sticky notes".

    A click on one of the more lucrative keyword ads may finance multiple trees at a time, others may finance a fraction. Taking into account that not every Ecosia user clicks on an ad every time they search, we earn an average of 0.5 cents (Euro) per search.

    Does one search finance one new tree?

    No, it takes approximately 45 searches to finance the planting of one tree. We know that Ecosia earns an average of 0.5 cents (EUR) per search. It costs our tree planting partners about 0.22 EUR to plant a tree. 22 cents divided by 0.5 cents makes about 45 searches until we can plant one new tree. Depending on clicks on ads and how much search ad revenue these generate for Ecosia, it may take fewer searches. Think of it this way: we currently fund the planting of a new tree every second.

    How much money do you make in a month?

    This depends on – you probably guessed it – clicks on ads. During the European summer months, our net revenue is often lower because people would rather be outside, whereas in winter our revenue peaks (especially around Christmas). To keep track of our monthly earnings and costs, take a look at our financial reports.

    How much money goes into tree-planting programs?

    Whereas our monthly income may vary, one thing is always for sure: we use our profits from search ad revenue for tree planting!

    We love being transparent with you. That's why we publish monthly financial reports and tree-planting receipts. These show exactly how much money we made from your searches, and what percentage of our revenue went towards trees.

    Ecosia does not pay out any dividends to its owners. All profits stay within the company and will eventually either be invested or used for tree planting.

    Please note that it takes six weeks to process the month's payments.

  63. Shubham Ambekar says:

    Ecosia is better than Google.

  64. edrrkk says:

    Thank god there are no “2019?” Comments

  65. Class Punk says:

  66. Tanthien Nguyen says:

    Gleich Weg aber Kürzen…

  67. FdPros says:

    cOntRol F

  68. Mr. Garber says:

    Ads are hardly distinct from results. You need to jump 5 links down, before you are away from the ads.

  69. Sheikh Ishaq says:

    Better than any seo tutorial in the world

  70. zoo stupormundi says:

    How about not censuring conservatives.

  71. BvsMAcosh says:

    Paid ads First, then your artifically buffered interest bubble based on your profile, cookies and popularity. If your result doesn't fit into this, you simply won't see it, regardless of how "relevant" it is.

  72. Leonora Dompor says:

    Computers AI obey God !

  73. Leonora Dompor says:

    Computers can identify the voice of God and God's ideas,algorithms knows God's ideas is on the top ideas !

  74. Radio 4Men says:


  75. Tom says:

    Can you believe
    This video was uploaded 9years ago

  76. darren marchant says:

    does this page agree with the politics at Google.

  77. darren marchant says:

    page rank increases echo chamber results reducing the originality of the search. this prevents me from finding information that is new to me.

  78. Daniel Kolbin says:


  79. Frank Lippert says:

    The only time I see no ads within a YT video, go figure.

  80. Austin Cook says:

    Google: "we take our advertising very seriously"
    Also Google: "fReE mINeCraFT"

  81. jeddog marland says:

    I am doing this for homework

  82. Vachagan Balayan says:

    i wonder whats the page with the highest pagerank :)))

  83. Nikita Tikhonov says:


  84. Shah Alam says:

    How work

  85. /// Addilyn Gacha /// says:


  86. Jacob Adcock says:

    this is dum and gay

  87. Maria Oliveira says:

    Eu quero ver os preços da Feira Livre

  88. Ethan Rumbold says:

    I googled how to use google.

  89. marco de antoni ratti says:

    Depends on what Google human resources manually position at the top-ranking results.

    Not only for sponsored URLs. But also for a manipulated, politically controlled and censored information. Google work with police and military regimes.

  90. Quech says:

    What if I don't want ads

  91. sunaina dhanave says:

    Ya this is helpful . Hey thanks

  92. YASH PATEL says:

    Then what is Google search
    The definition of Google search engine

  93. Mike Nolan says:

    "impartial" lol

  94. Matouš Kvapil says:


  95. Vít Homuta says:

    xd good

  96. Denisa Veselá says:

    dobry toje

  97. Übermensch says:

    Before when Google had some semblance of impartiality. Ah, good days. Now I can't wait for this company to go to hell.

  98. nilay kanakia says:

    Yes, but how does it go through so many pages so fast? There are millions of results for each search and it takes less than a second. What kind of technology do you use:)

  99. automated slayer 1789 says:

    This guy is a fkn liar .. I just paid them to make sure our company gets put to the top of the searches lol that means search is easily flawed because we can pay for the search results .

  100. MUSLIMS MEDIA says:

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