How Does Search Engines Algorithm Work?
How Does Search Engines Algorithm Work?

Search engines are your gateway to the internet. Search engines take large amounts of information from a website and break it down to determine if it answers a particular query. How do search engines work with all this data? Search engines use sophisticated algorithms to determine the quality and relevance of each page in order to discover, categorize and rank the millions of websites that make up the internet.

What is the working principle of search engines?

Three primary functions are the basis of search engines:

  1. Crawling: Browse the Internet looking for content.
  2. Indexing Store and organizing the content discovered during the crawling process. Once a page has been added to the index, it will be available for display as a result of relevant queries.
  3. Ranking Provide the content that best answers a searcher’s query. This means that results are sorted by most relevant to least pertinent.

What is search engine crawling?

Crawling refers to the process by which search engines send out a group of robots (known collectively as crawlers or spiders), in order to discover new and updated content. It can be a webpage, image, video, PDF, or another type of content. Regardless of format, links are used to discover content.

Googlebot begins by fetching some web pages and then follows links to discover new URLs. The crawler can then follow the links to find new content. They add the URL to their index Caffeine, which is a huge database of URLs that they have discovered. This allows them to retrieve the information later when a searcher needs it.

What is a search engine index?

Search engines store and process information found in an index. This is a massive database that contains all the content they have discovered and feels good enough to offer searchers.

What is Search Engine Ranking?

Search engines search their index to find highly relevant content. They then order that content in an attempt to solve the query. The ranking is the process of ranking search results based on relevance. It is generally believed that the higher ranking a website is, the more relevant it is to the query. Search engine crawlers can block a portion or all of your website, or tell search engines not to store certain pages in their index. Although there are reasons to do this, it is not necessary if your content is important enough to search engines. It’s just as good as invisible if it isn’t.

Tell search engines how to crawl your site

Google Search Console and the “site:” advanced operator revealed that certain pages of your most important pages were not included in the index. If this is the case, you have options to direct Googlebot as to how you would like your web content crawled. You can tell search engines how to crawl your website, which will give you more control over what ends up in the index.

While most people focus on making Google find important pages, it is easy to forget there are likely to be pages that you don’t want Googlebot to find. These could include URLs with thin content, duplicate URLs or special promo codes pages, staging pages, or test pages, as well as URLs that don’t have any text.


Robots.txt files can be found in the root directory for websites (ex. and suggest which parts of your site search engines should and shouldn’t crawl, as well as the speed at which they crawl your site

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Search engines can follow your website navigation?

A crawler must find your site through links from other websites. It also needs links from your site to navigate it from one page to the next. It’s possible for search engines to miss a page that you have created, but they won’t find it if it’s not linked to other pages. Many websites make the fatal mistake of making their navigation difficult for search engines. This can hinder their ability to be listed in search results.

What can I do to see how the Googlebot crawler views my page?

Yes, this cached website will show an image of the previous moment that Googlebot visited it. You can check out the cached version of an internet page looks like when you click the drop-down menu right next to the URL on the SERP and then select “Cached”:

cached version
cached version

You can also look at the version that is text-only of your website to see the extent to which your site’s content is being crawled or effectively cached.

Are pages ever removed from the index?

Yes, web pages may be removed from the index! One of the primary reasons for a URL to be removed are:

  • The page is returning a “not found” error (4XX) or server error (5XX) It may be accidental (the website was changed, and a 301 redirect was not established) or it could be intentional (the page was removed and 404ed to remove it of the search results)
  • The URL was marked with a meta tag that said noindex The tag is placed by the site’s owners to tell the search engine to remove the site from its search index.
  • The URL was manually penalized for a violation of Google’s Webmaster Guidelines and, as the result, was taken out of the search results.
  • The URL has been stopped from crawling by the introduction of a password before users can be able to access it.

The evolution of search results

In this competitive world of search having the number one position was considered to be the ultimate goal of SEO. However, something changed. Google began to add results with new formats to their search result pages. These are known as the SERP features. The SERP features include:

  • Paid ads
  • Highlighted snippets of text
  • People Also Ask Boxes
  • Local (map) pack
  • Knowledge panel
  • Sitelinks

And Google is adding new SERPs every day. They even tested “zero-result SERPs,” an experiment in which only an individual result of Knowledge Graph was displayed on the SERP, with no other results beneath it, with the exception of the choice of “view more results.”


The algorithm used by search engines examines the meaning and context of the words you type to show the most relevant results.

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