Do you know how do search engines work? If not, this simple article gives you the clear Idea of how it works?
For implementing any Off-page or On-page SEO strategies, it is necessary to have a basic idea of how does search engine work.
There are many search engines available on the web, but for many bloggers search engine means Google. The reason is that Google carries more than 65% organic Search(Source: comScore qSearch). So here, I mainly focus on Google Search engine.
How Does Google Search Work?
There are three basic steps for Google Search engine to show results.
Crawling is the first step done by the Search engine. In this step, crawler finds information available on the website. The well-known crawler is “Google Bot.” also known as Google Spider. This automated bot visits the site by web address and sitemap provided by the website owner and looks for links and links to another site.
Google bot decides which sites to crawl, and how often to crawl. According to Google, they do not accept payment to fast crawling of the website.
This computer program pays particular attention when crawling, like internal link and link to other sites, and even changes made on that site.
However, as a website owner, they have the choice to tell Google what pages they want to crawl and what not to index by the use of “robots.txt.” and also have the option to give a clear instruction for a custom search.
Indexing is the next step done by the Search engine. In this step, Google organizes all the information collected by Crawler.
For any site to show content in Google custom search, it must be in Google index. It is as simple as books index in a library. Google has over billions of pages in their index library.
If your blog is new and you want to check for which pages of your blog indexed in Google, do a google search for “site:mydomain.com”(type actual URL of your site).
If you do not want any particular page from indexing, simply do the “NO-Index” or No-follow. You can also do the On-demand Indexing for quick indexing of newly updated page.
The most complicated part starts from here. All the webmasters need to pay more attention to this part.
The crawling and indexing start before even a search query starts. There are billions of pages in their database for different queries.
When a user searches for any query, the logic-based program called Google Algorithm finds into Google Index and then provide the most appropriate answer to that question and ranks them in Search Engine Results Page (SERP).
There are mainly four updates of Google Algorithms:
- Google Panda
- Google Penguin
- Google Hummingbird
- Google Pigeon
- Google Page Rank.
Here is a quick overview of those Google Algorithm.
Google released its first Google Panda update in February 2011, and the name “Panda” comes from the name of its engineer Navneet Panda.
The Panda update aimed for lower the rank of Low-Quality and Thin sites and to get the higher quality site in the Top list of SERP.
Google first announced Google Penguin in April 2012.
The aim of Google Penguin is decreasing the search ranking of a website that violets the Google Webmaster Guidelines by using black-hat SEO techniques like Link Schemes.
Google started using Hummingbird in August 2013.
According to Michelle Hill, Hummingbird is all about “understanding intent,” means Hummingbird judges the intention of a person who is searching, to determine what the person is trying to find out.
Unlike other Algorithms, Hummingbird not only focuses on each word but also concentrate on the meaning of a whole sentence or page and provide the most relevant content to the searcher.
Google Pigeon is the local search algorithm launched in July 2014. The prime aim of this algorithm is to improve the ranking of the local list in a SERP. This is more useful to local business.
Google PageRank is a link analysis algorithm. PageRank name comes from one the founders of Google, Larry Page.
PageRank works by finding the number of quality links to a page and estimate that how popular the website is that. As I said, PageRank gives the more important to quality link rather than quantity of links.
Google algorithms are constantly updating as their engineers want to upgrade them for better results.
Now I hope that you got the Idea about Google Algorithm.
As per Google, their algorithms relies on 200 ranking factors or signals and provide the appropriate answer to that question. Some of them include.
- Keyword in Title, URL, Description and
- Keyword density
- Backlinks and authority of those links
- Spelling, synonym, and Grammer
- Freshness of the content
- Quality of web page
- Mobile responsive
Google not only identify the quality page and rank higher in Search results but also penalize and remove the spam sites from its listing.
Here, some types of Spam that Google identify and remove from Search results are:
- Pure spam
- Hacked sites
- Unnatural links
- Keyword stuffing.
However, this manual action does not last forever. They inform the website owner to help him to address the issue and give a chance to clean up the spammy content on the site. Once a webmaster removes the spammy content on the website, the owner may request to Google for reconsideration.
That is how search engines work. Behind every simple search, there is a well crafted complex process going on in an eye blinking time. According to Google, it carries more than one-hundred billion searches each month.
If you still have any confusion about how it works, then watch this simple video by Google.
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