I want to start a portal, what is better to use, especially from seo point of view: chat.mydomain.com poll.mydomain.com or mydomain.com/poll and mydomain.com/chat ? or it does not matter? Also is it bad if mydomain.net redirect to chat.mydomain.com for example?
First of all you have to be clear in yourself, wheather you want to start a new venture or want to start it in existed one. Understood.
I will buy 5 new domains: one will be my main domain for the portal the other 4 will redirect to subdomains on the first domain name. the question is there a problem in this from seo point of view? the second question is better to redirect these domains to mydomain.com/poll or to poll.mydomain.com or it does not matter? Thank you
(1) At seo point of view, I think subfolder can do better. Subfolder will be treated as a part of main site and will bring overall weight to site in SE eyes. (2) If you are re-directing then .... I think again sub-folder. The redirect should be 301. It will pass PR and weight also. Sub-domains are treated as different domains in search engines eye. They only do the purpose of marketing one name.
It will not be bad if you start on a sub domain as even the digitalpoint forums are on the sub domain forums.digitalpoint.com I hope you understand
Go for a mega site - the SEs love them Use a sub domain for your chat and poll. Think about this - you're chat isn't going to be spiderable.