Organic Quality Score (Almost Certainly)

Organic Quality Score (Almost Certainly)
H/T Moz

Almost certainly there. Rand Fishkin explains.

Domain-wide, so that would be across one domain, if there are many pages with high quality scores, Google might view that domain differently from a domain with a variety of quality scores on it or one with generally low ones.

Same thing for a subdomain. So it could be that a subdomain is looked at differently than the main domain, or that two different subdomains may be viewed differently. If content appears to have high quality scores on this one, but not on this one, Google might generally not pass all the ranking signals or give the same weight to the quality scores over here or to the subdomain over here.

Same thing is true with subfolders, although to a lesser extent. In fact, this is kind of in descending order. So you can generally surmise that Google will pass these more across subfolders than they will across subdomains and more across subdomains than across root domains.

https://moz.com/blog/organic-quality-score?utm_source=google_plus&utm_medium=social&utm_campaign=whiteboard_friday