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.

sym_ng10-1

Symmetry

Variations that create multiple copies with various symmetrical variations.

Splitters Groups Variations Sample Corners

Splitters

Variations that split the flame in various ways.

shredrad 1

Shredders

Variations that shred the plane in various ways.

Importers group colormap_wf-2 variation sample

Importers

Variations that import a flame, image, etc. from elsewhere.