Hi I have a question for building a few sites. the structure will be: UnrelatedSite1.MainDomain.com UnrelatedSite2.MainDomain.com Main domain will be developed as well as the subdomains. Question is will this hurt google ranking or is it irrelevant? Thank you. Thew will be adsense sites BTW
It may hurt google ranking if all subdomain sites have the same structure, poor quality and some other factors only google knows. I happened to me several times so it is only my experience.
if you keep main domain and sub-domains separate (i mean without any link exchange) , it is not going to hurt your ranking.
Thanks for the answer guys. So my understanding is that no interlinking it will not hurt? How about if the sites are related AND interlinked? Good , bad or indifferent?