As easy as most web 2.0 applications are to use, sometimes it’s the concept of a tool that’s hard to describe to somebody. “Why exactly would I use social bookmarking? Why aren’t my regular bookmarks good enough?” Fortunately, the geniuses at Common Craft work hard to explain these concepts in plain English. They are a consulting company based in Seattle, who make short videos in a format they call Paperworks. These short videos use simple, hand-drawn illustrations that are moved on and off the screen by hands, while the narrator explains things to you. They’re light, humorous, and they really make complex ideas easier to understand. Go check out their popular videos on blogs, RSS, wikis, social bookmarking, online photo sharing, and social networking. Their product is explanation.