Social Media explained: Doesn't Portal = Website? Isn't Facebook a Webpage tailored differently. Social Media is many things all slightly different (like Twitter) especially if it is configured as a Feed of Information that leads people to - A Website.
A Blog is a ... Website. i.e. Wordpress (Blogging) want to offer Advertising but only if you have a Public Domain Name therefore a Website...Call all these things what you like but a Magazine is a Magazine, a Newspaper a Newspaper, a Website is a Website.