Google+ profiles are subject to Google's real-names policy. Your profile is supposed to be you, and every day Google deletes profiles that do not conform.
Google+ pages are for other online identities. That could be a business, a community group, a web page, even a brand.
A page created this blog, in the same way that a regular Google account can create blogs. (That's actually the purpose of this blog.)
There are some differences between Google+ pages and profiles: