Hi, I have a webpage (ex. www.ggggg.com) and a blog (ex. ttt-pppp.blogspot.com). I am thinking about use the same address, for ex. www.ggggg.com/blog but my question is... What is better two addresses or just one for google position? Thanks
Sub-domain or sub-folder they are considered the same thing, not to long ago Google started considering them both as the same thing (via Matt Cutts blog), however you'll benefit either way by having it all on the same domain name.
Same as here... For me, having a blog as a subfolder is much better because as you updated your blog, SEs, specially Google, will always crawl your blogs, and so the other pages of your website.