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Ali Husayni

How Googlebots Crawl and Index Your Website

NASHVILLE, TN – There are millions of websites out there competing for a top spot on Google. Google needs to know what all these sites are about to correctly categorize them and deliver relevant results to users.

“We use a huge set of computers to fetch (or “crawl”) billions of pages on the Web,” Google says. I’d like to know how many computers are working automatically to search and categorize these billions of pages. One report from last year estimated that Google uses about 900,000 servers. Google has never revealed how many computers they’re running, but they do give us some information on their energy efficiency at their data centers.

Googlebots are simply computer programs that run set algorithms to fetch websites. Googlebots have many names – spiders, robots and bots. These computer programs decide how often your website is crawled and which pages to fetch from it. Search engine optimization firms don’t know exactly how these algorithms are set up to crawl your pages, but Google provides us some insight in the Google Webmaster Tools.

“Google’s crawl process begins with a list of Web page URLs generated from previous crawl processes and augmented with Sitemap data provided by webmasters,” Google says.

The bots start crawling URLs on their lists, and each time a link is found it’s put on the list to be crawled. Dead links found are updated in the Google index.

Googlebot goes through each line of your website. Every word counts, and Google even notes where on the page the words are found. That’s why it’s important to have your most valuable keywords listed sooner rather than later.

“We process information included in key content tags and attributes, such as Title tags and ALT attributes,” Google says.

Make sure your HTML  contains keywords in these important sections. ALT attributes pertain to images on your website. Title tags can be used to include desired keywords, but be careful not to “stuff” keywords in these tags. Updating your website often and including rich attribution tags are some of the best SEO techniques.

“Googlebot can process many, but not all, content types,” according to the Webmaster Tools. “For example, we cannot process the content of some rich media files or dynamic pages.”

Interestingly, Google’s blogging platform Blogger recently made dynamic pages part of their template options even though these pages can’t be crawled.

Now that you’ve optimized your HTML tags, it’s time to make sure all your links are working. Dead links and bad links are no good.

Google tells us that most websites in their database haven’t been manually added, but were found by automatic crawling. Google does miss some sites, but only those without links to them. Some sites don’t have many inbound links, and other sites are poorly designed for crawling. (Here are some helpful tips from Google on how to make your site easy to crawl.)

You can check to see if Google has indexed your site. Type “site:yoursite.com” into the Google query bar. If your site comes up, then Google has indexed it. Provide Google with a Sitemap of your website to encourage Google to crawl and index your site.

Remember to ask Google to crawl your site after you’ve notably updated a page or when you’ve added a new page. That will help Google know you’re ready for a new crawl.

Thanks for reading, and please feel free to leave comments and ask questions.

How Googlebots Crawl and Index Your Website was last modified: September 15th, 2018 by Ali Husayni
22 thoughts on “How Googlebots Crawl and Index Your Website
  1. منتديات تيوت says:

    My articles are not crawling quickly, they are taking 4 to 5 days and my articles are not seen even on the 10th or 20th page.

  2. Prem says:

    Thank you so much for this informative post. It helped me a lot. Google indexed me within 12 hours. 🙂

  3. navneet says:

    my articles are not crawling quickly,…..they are taking 4 to 5 days and my articles are not seen even on the 10th or 20th page

  4. navneet says:

    my articles are not crawling quickly,…..they are taking 4 to 5 days….

  5. dany says:

    i have problem with my site, i have sitemap and add on google webmaster, i wait 3 days but there is no index my page.. why google so long to indexing my site ??

  6. Maddy says:

    Thanks for this great information, really like it.

  7. Hey…Its a really very nice post and i got almost all answers of many queries from here… !! But still i want that if your page URL has many slash (\”/\”) than crawler gives less priority or high priority for crawling?? Or its effect in some other way..?

    Thanks ….

  8. Deepak Soni says:

    hi, Thanks for the infomation. I have submitted sitemap before 15 days to google, yahoo and bing. Now the problem is google still not listed my webiste if bing is already listed. Pls help me

  9. mitchellm says:

    It is really interesting to know about the estimation of huge sets of computers.

  10. ali says:

    This is simply a great article which does provide the relevant information in fewer words. It is really interesting to know about the estimation of huge sets of computers.

  11. Rajendra Singh Rawat says:

    Google does on the average excellent job in locating and indexing websites but the y should also give higher ranking to the website that represent the the direct organisations offering the the particular mentioned product and give lower rankings to web portals that charge individual website owners for enquirers.Its a a pity I get more calls from the web portals or yellow pages for registration to get inquiries from them ,

  12. Jessica Bates says:

    @Shahid
    Hi Shahid,
    You can tell Google that your website is updated by submitting a Sitemap. Here is the link to Google\’s webmaster tools where you can find more information on how to do that: http://support.google.com/webmasters/bin/answer.py?hl=en&answer=183669&topic=8476&ctx=topic

    Thanks for reading! 🙂

  13. Jessica Bates says:

    @ali zaidi
    Hi Ali,
    When I try this with my personal website, the first thing that comes up is in a box and is labeled \”Google promotion\”. The second item is indeed my website, which confirms that Google has indexed it.

  14. Amin says:

    Hi. I like this article about Google crawling. I think getting crawled is the gate to the world of search engine marketing.
    And I agree that a sitemap takes the heat off of search engines for indexing new born pages.

    Thanks for sharing the good stuff!

  15. Amin says:

    ali zaidi :
    I typed site:yoursite.com on google search bar but advertisment appeared rather what u wrote in ur blog. I believe u wrote this blog for commercial purpose

    That is rude indeed!!!
    No matter what you search in Google, the ads come up along with the results. It has nothing to do with what is said in this article. Don\’t you wanna think it twice?!

  16. Shahid says:

    How to ask google for crawl and index, when I update a page or add a new page?

  17. Md. Aminul Islam says:

    Dear Jessica Bates

    Thanks for mail
    I went to change my website design

    Thanks by

    Aminul

  18. Dildar shah says:

    Hello! Someone in my Facebook group shared this website with us so I came to take a look. I’m definitely enjoying the information. I’m bookmarking and will be tweeting this to my followers! Fantastic blog and excellent style and design

  19. hey jessica, one year my full attention on one of my friend\’s blog-based. blogspot. in a struggle for keywords in an SEO contest, this blog always get top google search result and the result has always been a champion number one, I\’m curious what the secret is and I\’m trying to find a simulation tool SEO. result blogspot belongs to my friend was already getting backlinks from google almost a hundred points.
    when the contents of the blog content is normal in grammar and presentation. This can be compared with other sites, but since google already fallen in love with my friend\’s blog that he has always been a champion in the struggle for the contest keyword.

    conclusion: the actual google search results can not be said to be irrelevant if only using an algorithm that makes even less sense.

  20. Rajendra Singh Rawat says:

    whenever we put a key words in search engines the portals registering companies are found these portal making money from the service providers . the users hardly gets a services directly he want instead land up to some postal . since the day I made a presence in net I get more call from these portals than the actual enquirers. Can Google make a note of it and provide more links to actual service providers than portals

  21. ali zaidi says:

    I typed site:yoursite.com on google search bar but advertisment appeared rather what u wrote in ur blog. I believe u wrote this blog for commercial purpose

  22. Pragati says:

    This is simply a great article which does provide the relevant information in fewer words. It is really interesting to know about the estimation of huge sets of computers.

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