If the domain is has an extremely high authority (80+), I would consider it due to potential to dominate the SERPs by getting the www.web version and state.web version both to rank high.

Thanks, the domains authority is 43, it is not so high.

_Yes, stick with folders. It's much simpler and much better organization (states correct as Atlanta a city). _

Yes, it is true, thank you!

Next, I second everyone else, subfolders are much more organized, subfolders look better, and subdomains are an old SEO strategy (a little spammy, especially for a new domain)

It is an old domain (registered 1994). What guys you mean by better structured? Sorry if it is a simple question, I just want to be sure if it is what I think.

Also if a web site is in subdomain, does the main domain still pass some authority to the subdomain or not much?

Hi,

one of our clients has an idea of making subdomains from his main website to sell his online advertisements in all states in USA.

f.e:

texas.web.com

atlanta.web.com

He wants to have a subdomain for every state and there to be information related only or mainly to this state?

I am not sure about is this a good idea? What is your opinion about it?

Hi, I want to ask do you thing that it is good and necessary to have a subdomain with a keyword in it when the domain doesn't include it?

f.e. you have a website named

domain.com

but there is no keyword in it. And if you add subdomain

keyword.domain.com

will this bring any benefit?

Hi,

I want to ask is it possible for a website with about 20 pages to be ranked well in Google for keywords with middle concurency? Most of the web sites in  the top for such keywords are with much content and many pages.

This is the web site:

http://logos-sofia.com/

And that's are the comeptitors:

https://www.google.bg/search?q=курсове+по+немски&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a