User blog comment:DaNASCAT/Technical Update: March 7, 2016/@comment-25739558-20160308125907/@comment-4053809-20160308165012

I can speak to the question about the "Image Reviewer" group - that's a very limited number of special accounts that have access to Wikia's Image Review tool but have zero other "rights" or abilities on Wikia. Despite it only ever being seen on Central, it's a global user right we created specifically for this one, single purpose: Reviewing all images that are uploaded to Wikia to ensure they are within Wikia's Terms of Use.