Search Engine Web Crawlers(3 steps)

Web crawlers are like the spies of search engines. They can find each and every piece of content your website has. So, it’s very much important to know their working principle helping you to understand the importance of website structure.
So, let’s dive into the ocean.

What is Search Engine Web Crawlers

Search Engine Web Crawlers is a bunch of algorithms that search engines use for crawling your website. It’s a team that navigates your website for a given time frame.

It is also called web spider or robot.

 How does it work?

First of all, it’s just an algorithm by search engine built to help search engines to find all the links you’ve connected on the web. 

So make sure to have a good internal linking structure.

Well, We will go through this process step by step for better understanding.

Step 1: First of all, search engines send a team of crawlers on your home page(seed page).

Web Crawlers sending in Home Page

Step2: crawlers extract all of the links from top to bottom of the page.

Extract links by web crawlers

Step 3: They keep all of the links into a list and keep going all the pages following the links.

Followed link by web crawlers

By the end of the process, they collect more pages and continue process 2 and 3. 

Thus a web crawler crawls your whole website and listing your new or updated web pages within crawl budget(later discuss).

Indexing after crawling

When a crawler crawls a web page, search engines scour all of your page content and keep track of your page for all the words you have.
For example, if you have content about dog grooming in London. Then search engines track your content for the entries of these keywords you use.
When someone will search for this keyword “dog grooming in London” or partially matches the keyword, then search engines will show your content if it passes most of the test by the search engines.

Page Indexing by Search Engines

Live example

In this example, we will show a basic interlinked path from a website “Backlinko.”

I have analyzed more than 300 hundred inner linked pages of this website. What I’ve figured out is the site has very well defined site architecture.

Web Crawlers path by internal linking

In this image, you’ve noticed how spiders are spread out through links.

You see, Hub pages are not directly connected to the home page. But it has a very good interlink that shows the precise way to the spiders.

(Arrow marks(start from the left side) indicate how a spider completes its path through links.)

Crawl Budget

You already have a basic idea of how web crawlers work.

Well, it’s time to have a look at the crawl budget.

Crawl budget is a varying time-frame that determines how many pages will be crawled and indexed by GoogleBot within the predefined time frame by a search engine.

Why it’s crucial to know crawl budget

Search engine crawls your website for collecting and updating content with a given time frame.

Crawl budget depends on some parameters for a particular website. Your website’s performance, quality, speed, popularity, user experience are some of those parameters in which the crawl budget is measured.

If your site’s health is OK, your site’s crawl budget will increase, that’s a good sign for you.

Otherwise, your crawl budget will decrease. 

It causes crawling minimum pages on your budget time.

“Spider eats more, Crawler needs more.”

Importance of Crawl Budget

Fortunately, if you have a small website less than thousands of pages, then you need not worry.

If you have a large site like an e-commerce site of ten thousand pages or more, then you must regularly audit your website for maximizing your crawl budget.

Crawl Budget Importance(video)

Importance of crawl budget: You can watch this.

Use sitemap

By adding a sitemap, Googlebot quickly finds all of your content to crawl and index. In effect, any non- interlinked page also crawled and indexed by the search engine.

But don’t rely on the sitemap. Make sure to build a well-defined website architecture where every page is interlinked properly.  

Use robots.txt file

Using robots.txt file guides search engines to make sure what to crawl and what not to crawl.

If you have some pages that you want the search engine not to crawl, then you can disallow them by this text file.

It will maximize your crawl budget for crawling important pages. The Minimum number of pages you have, the most successful crawling rate you will gain.

So, delete all of your useless pages or tell Google to not index those pages by disallow command.

robots.txt file

Now it’s your turn 

This is all about Search Engine Web Crawlers working.

Hope you already have a basic knowledge of crawling, crawl budget, the importance of sitemap, and robots.txt file.

Thanks for going through this article. If you’ve found any value, share it and comment here for letting me know if you have any problems or not. You can contact me for free consultancy.

Regards Niks

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