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Hosting images externally
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In these days of CDNs does it matter for SEO whether images (and PDFs etc.) are hosted off-site?
Does it make a difference if images hosted on Flickr, photobucket etc.
Thanks
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When it comes to hosting images off site, keep in mind that there may be connectivity and image load speed issues associated with these images. I typically wouldn't rely on an image being pulled from someone else's site, even if it was something like Flickr or Photobucket. I don't think those particular services intend for you to use their service like that.
Rather, we typically will set up a CDN for hosting the images or PDFs, and use a subdomain of the main site in order to host the images. For example, we would set up images.domain.com and pdf.domain.com and put the images and PDFs on the CDN.
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As long as they still have ALT tags and such I don't think it would make any difference.
The only thing to consider would be the loading speed. As if it has to go off to another server/site to retrieve the image it may take longer to load and affect your page load speed (slow speed is bad for SEO).
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