What is a web crawler? - Calibre9

Web Crawler

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What is a web crawler?

A web crawler (also known as a spider) are bots that are used to discover and read web pages. Google uses multiple versions of their crawler “GoogleBot” to find and index pages. If your content has not been discovered by GoogleBot, it will not appear in search results. Websites that are easy to crawl will consistently rank better than sites that are more difficult to discover.

 

 

↓ Scroll to See Frequently Asked Questions ↓

Can web crawlers access all types of web pages?

Google’s web crawler can read most types of pages. It does however, render and process JavaScript separately to HTML, and usually at a much slower rate. For this reason, it is recommended that you do not use JavaScript to load important internal links on your website. Excessive JavaScript can also slow down your site, causing further drops in rankings.

How can I optimise my website for web crawlers?

Crawlers rely on links to make their way around your website. You can optimise your site for crawlers in much the same way that you do for humans. Make sure that all pages are linked into the site structure and that the most important pages are the most linked (usually via the header and/or footer). It is also a good idea to make sure your internal linking is rendered in the page’s HTML and not loaded later via JavaScript.

How can I know if a web crawler has visited my website?

The easiest way to know if Google’s crawler has visited your site is via Google Search Console. In the Search Console, you can see all of the pages that Google’s crawler has discovered and whether it has decided to index them or not. For non-indexed pages you can see what issues are currently preventing the page from being indexed.

Can I ask Google to crawl my site?

Yes. In Google Search Console you can submit individual pages to be crawled. This is a valuable tool for times that GoogleBot has failed to discover important pages on your site.

 

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