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.

JacksTrippyCurlv

Jack’s Trippy Curl v2

This script is based on a flame created by Jack De Pauw with permission and randomized the params his gradient is provided but you will have to add the jacks_bw.map to your gradient folder to use it