Blog:Blogger is Google's free tool for creating blogs. Blogs, short for web-logs, are a form of online journal.
Article: An article (abbreviated ART) is a word (or prefix or suffix) that is with a noun to indicate the type of reference being made by the noun.
Press Releases: i think press release is any form of information supplied to the media, which could be through emails, faxes, newspaper articles or
video/audio recordings. It is also called a news release, press statement, media release or video release.
Article is the best.