Crawling: What is it, and why does Google do it?

As of 2022, there are expected to be 1.5 billion active websites. To put that into perspective, with a global population of just under 8 billion people, nearly every fifth person owns their own website. The internet is vast, and in the time it took you to absorb these facts, several new websites appeared at a rate of two or three every second. As the premier search engine, Google’s objective is to discover new websites, which it accomplishes via a piece of software known as a crawler.
What is a Crawler exactly?
A crawler is a piece of software that attempts to visit as many websites as possible in order to discover new ones and report on those that it encounters. The information gathered is then used to create an index of websites on the internet, allowing users to obtain data and gain access rapidly. Crawlers are also called spiders, ants, and indexers.
Google uses this data to judge a website’s overall quality, upping or lowering its SEO ranking as a result. The most important metrics influencing this selection are the ‘core web vitals’ measurement criteria, which comprise LCP (Largest Contentful Paint), FID (First Input Delay), and CLS (Content Load Speed) (Cumulative Layout Shifts). Visit our main web vitals blog to learn more about each of these metrics.
Crawlers are classified into two categories
While a crawler’s purpose is simple, the work they do is critical; nonetheless, despite the complexities of their duties, web crawlers are only split into two groups.
The purpose of ‘discovery’ web crawlers is to locate new pages on your website by following links – often from your home page – to other areas of the site and checking for any changes that may have occurred since the last crawl.
You also have the refresh crawler, which returns to previously scanned sites to obtain new data readings and update Google’s general site information.
Why does Google behave this way?
Search engines other than Google utilize crawlers. Bing, Baidu, Duck Go, and all of the other search engines you’re likely to use have variations of the same web crawler that perform comparable functions.
The crawler’s data is critical to the search engine; it assesses the overall quality of the website and has a big impact on SEO rankings. Hiring a good SEO company in Dubai is helpful to you. Google’s crawlers can quickly discover harmful or spammy websites, making them more difficult to find for users while improving the reach of websites that meet the requirements.

Crawling: What is it, and why does Google do it?