Welcome to WebmasterWorld Guest from 18.104.22.168
Forum Moderators: open
Given that all subdomains are linked to from the mainpage of mysite.com, do you think it will be OK to link back to the mainpage from all sub-domains, or would we be asking for trouble?
The two sites where linked on most pages as they complimented each other very well both offer wigets one blue another red, this was not done to try and increase PR as most of the page where PR4 & 5 but to offer people another product
But thatís the only thing I can think of the would cause a penalty so be careful and yes both site where hosted with different companies
Now, that being said, if you've only got one page for each "region" and they are identical other than the city name and the currency, etc. then I probably wouldn't link back. I've recently subdivided my site into "Main Information Domain" and "Shopping for the stuff on the Main Domain" subdomain and crosslink extensively. It's only been in one update, but Google seems to love it as it can easily "theme me out" by saying "Okay - main.com = 'info', buy.main.com = 'products'). So much so that my shopping subdomain ranks very well with "buy" words and the related "info" page ranks higher without the "buy words".
Using sub-domains and crosslinking does not appear to help in linking rank. At least in the thousands that we have tested. So the only reason you want to use it is to facilitate user experience.