What exactly are crawlers?

So im seeing this


and I was wondering what crawlers are?

Crawlers would be things like Google Search automating “crawling” your website for content so that Google Search can present your site when you search for it.

There are also other crawlers besides Google’s.

You should check out this post (and the link in it) for more info: Better pageview metrics with the new site traffic report

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For simplest understanding, crawlers are bots that crawl pages online and follow links to crawl even more pages. Mostly used by search engines to build the index, there is other crawlers online for example wayback machine, etc.

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Most of them are actually SEO and AI companies, not search engines or other useful actors. And part X of those search bots are actually scrapers seaching weaknesses and stealing content.

On my forum and sites anyway.

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typical,people are always trying to steal other people’s work.