What's a Blog?

In this video at Pajama Market, Brian Brown offers an easy-to-comprehend tutorial on blogs that explains what they are and how they work.

So, what makes a blog a blog?

It's a Web site. This might seem too obvious, but for technophobes it might need to be said.
Adding articles is like writing an email. It's as simple as writing a title, writing a message, attaching an image and hitting send.
Readers can post comments. This interactive element differentiates blogs from many other Web sites.
Readers can subscribe. They don't have to check in all the time since they always know when new content goes up.

(Source:Marketing Profs)