Think of tags as like a book index where you find words and which pages they are on, the same principle applies here. Although it's taken a stage further so it might not be the word, but the subject, so for example if you're looking for things to do with fractal gradients for example. A tag may bring back posts with gradient files, as well as posts that discuss gradients, or tutorials about them.

Half Blur Flames

Sample Half Blur Flames for the Half Blur, not all work with JWildfire

flippers

Flippers

Variations that divide up the plane in various ways and flip or rotate the parts.

z manipulation group sample variation inflatez

Z manipulation

Variations that manipulate only the z coordinate. All of these must be used with another variation to process x and y (even if linear to simply copy it).