Tagging and social bookmarking are handy tools that enable users to re-organize the Web for their personal use. They also provide an effective way for publishers to tap into the Web’s viral marketing power.

But for people who don’t already do social bookmarking and don’t know about services such as del.icio.us, tagging can be a tough concept to grasp. Here’s a simple, straightforward explanation in the form of a low-tech video from the folks at Common Craft Productions.

Common Craft also has great quick-and-dirty videos that demystify RSS feeds, blogging, and other key elements of Web publishing.