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.
Posts tagged as checks
Check Me Out Flame
For the Checkerboard Flame Game, just something entirely random (ish). Wanted to play with 3D to see how the checks would twist.