What is a Blog?
“Blog” is an abbreviated version of “weblog,” which is a term used to describe web sites that maintain an ongoing chronicle of information. A blog is a frequently updated, personal website featuring diary-type commentary and links to articles or other Web sites. Blogs range from the personal, business to the political, and can focus on one narrow subject or a whole range of subjects.
WordPress is a state-of-the-art semantic personal publishing platform with a focus on aesthetics, web standards, and usability. More simply, WordPress is what you use when you want to work with your blogging software, not fight it.