Do links to blog.domainname.com help the www.domainname.com subdomain?

[geoffh]

Hi,

Do links to pages within the blog.domainname.com subdomain help the rankings of pages within  the main www.domainname.com subdomain? (where "domainname" is the same of course).

Thanks.

[EGOL]

If blog.domainname.com/page.html gets a link it will pass some value to www.domainname.com if there are links on blog.domainname.com that connect to www.domainname.com.  However, most of the power will stay in blog.domainname.com.

If your goal in blogging is to strengthen www.domainname.com by the addition of fresh content and acquisition of natural links then your blog should be located at... www.domainname.com/blog

[CPU]

Hi Geoff

The link below contains an article which may be of interest about when it is best to use one over the other.

http://www.whitefireseo.com/site-architecture/subdomain-or-subfolder-post-panda/

However I agree with EGOL's response.

Hope this helps.