Seo'ing Sub domains for images

[soltec]

We are currently adding some performance improvement to our websites, to improve user experience. One of the things we are looking at is splitting of images over several sub-domains, to increase the number of images that can be downloaded at the same.

We have seen that using key phrases within image names has an improvement in rankings.

So, the question is should we create sub-domains as key-phrase.example.co.uk or as i1.example.co.uk?

K

[EricaMcGillivray]

key-phrase.example.com

Anytime, you can get your keywords in the URL of your image, the better it will do for rankings. But do realize that subdomains do not boost your main domain's rankings like a sub-folder would. But I suppose this all depends on what the end goal of having your images rank is.