Google Explains Image Sub-domain Use For Crawling Optimization

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Google’s John Mueller answered a question about hosting images on separate sub-domains and whether it would help improve Google crawling on large websites.

The question refers to John’s statement during a past event; this time, his answer clarified that splitting image or content load makes sense if Google can’t efficiently crawl your site.


Simplifying Googlebot`s job
Search Engine Roundtable’s executive editor, Barry Schwartz, caught austria mobile numbers list a question on LinkedIn where an SEO professional asked Mueller to confirm whether he still recommends his past advice for larger sites to host images on separate domains to simplify Googlebot’s crawling job.

Here’s the question on LinkedIn:


Splitting the load can make sense
Google’s search advocate was quick to reply and gave this advice about when splitting the load across sub-domains or domains makes sense and how it applies to all content types:

“If Google has trouble crawling as much as it wants to crawl due to technical reasons, then splitting the load across sub-domains or domains makes sense.”
“Sometimes this makes sense for any kind of static content regardless of Google’s crawling (many sites have static content CDNs).”