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.

cpow group cpow variation sample

Cpow – Complex Power

Treats 2D points as complex numbers and raises them to a complex power that can be specified in various ways.