What is a blog?
A blog - a shorthand term that means "Web log" - is an online, chronological collection of personal commentary and links.
Easy to create and use from anywhere with an Internet connection, blogs are a form of Internet publishing that has become an established communications tool.
Read a two-page overview from an educational perspective: 7 Things You Should Know About Blogs (Educause article).
Short Video: Blogs in Plain English (by The Common Craft Show)