HOW SEARCH ENGINES WORK
Every search engine has two main functions: crawling (discovering content) and indexing (track and store content). This is how search engine work.
How google crawling works?
Google’s Crawlers (A kind of Software Google uses like Googlebot ) visit web pages to find the information.
These crawlers will crawl all web pages and follow links on those pages.
They go to each followed link like we do in order to gather the information and they bring data to Google’s server about those web pages.
This involves scanning sites and collecting details about each page: titles, images, keywords, other linked pages, etc.
Different crawlers may also look for different details like page layouts, where advertisements are placed, whether links are crammed in or not, etc.
Crawling begins with the past crawls and the sitemap given by webmasters or website owners in the past.
That is why we need to submit the sitemaps.
These Google Crawlers pay more attention to new sites, new web pages, changes in existing sites, follow links and dead links.
However, we can stop crawlers from crawling some web content and pages by modifying Robots.txt file.
This means any site that’s linked from an indexed site will eventually be crawled.
Some sites are crawled more frequently, and some are crawled to greater depths.
But sometimes a crawler may give up if a site’s page is too complex.
How google Indexing works?
When we say Google Indexing, it means that Google Organizes Information what it has gathered from crawling the web pages.
Depending upon Meta Tags, Titles, Keywords, Index and no-index status in Robots.txt file
Google adds web pages into search results.
Google index includes information about words and their locations.
When you search for something Google fetches information from this organized library.
It is the Basic information you should have while start learning SEO or Digital Marketing to get an idea how should you think while learning or adding meta tags to any website.
How search engine work.
Why Google index your site?
Page Indexing by Google is the next step after it gets crawled.
By no means does every site that gets crawled get indexed, but every site indexed had to be crawled.
If Google finds your new page worthy, it will index it.
Upon your page getting indexed, Google then comes up with how your page should be found in their search.
Google then decides what keywords and what ranking in each keyword search your page will land.
This is done by a variety of factors that ultimately make up the entire business of SEO.
Also, any links on the indexed page are now scheduled for crawling by the Google Bot.
It’s not only those links that get crawled, it is said that the Google bot will search up to five sites back.
That means if a page is linked to a page, which linked to other page, which linked to any other page which linked to your page (which just got indexed) then, they all will get crawled.
This is the basis of why external links that come to your site are so important.
The higher quality of the page that ultimately links to you, the better you will rank in the all-powerful Google Search.
This is what many SEO companies charge big money for—creating (or allowing the creation of)
many links coming to your site from hi-quality websites using keywords you want to be found by.
It is not the ONLY thing that an SEO Company may do, but it’s almost guaranteed to be on the list.
Why Google Indexed your site?
Although you need your site to be crawled, you want it to get indexed.
There are a couple of ways to determine what Google has indexed on your site.
One is to simply go to Google.com and click on Settings at the bottom right then choose Advanced Search.
From there, scroll down to “site or domain” put in your website and hit Search.
This will show you everything that Google has indexed.
It should include pages, posts as well as photos and possibly other things such as feeds.
The preferred way to see exactly what Google has indexed.
Because you have some control over fixing it, is to use Google Search Console (previously named Google Webmaster Tools).
We are not covering how to set up Google Search Console in this article, but if you have a website, it needs to be done.
Google Search Console lets you upload an XML Sitemap which lets you tell Google what you would like.
Them to index and how often they should check back for changes.
Google Search Console also provides a ton of valuable information on your website and is really the only two-way communication with Google that exists.
How Google Decide What To Index?
This is the genuine question everyone should be asking.
In the end, Google will index new, fresh content that Google thinks will improve the user experience of their clients.
That is the people that go to Google and search for something.
They are very Nero about trying to provide the most relevant websites for a specific search keyword.
If you are mimicking pages or using copy that is otherwise already in their index, there is no need to index yours.
You may have heard the term “Duplicate Content” forced around in SEO articles.
Duplicate content is a point of explanation for many SEO gurus, I subjectively say at best it mixes Google on which page to rank, at worst you get penalized.
In the end, stay away from the duplicate content.
But I diverge, If what you have written is satisfying or stocks more information or
Google otherwise believes that showing your page as crossed to the other pages will give their clients a better experience, they will index and rank your site.
This is why providing fresh, new SEO rich blog content is so important.
The more pages indexed with internal links to other pages within your site the better for SEO.
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