The text_wf variation incorporates a line of text into a flame. It is a blur variation like circleblur and starblur, meaning it ignores the input and just generates a shape; but instead of the shape being a circle or star, it is a line of text. The brain processes words differently from images, so this can add a new level of depth to fractal flames. Or the text can be a single symbol (not necessarily a letter), using text_wf as a blur with a specialized shape. Text_wf can be quite versatile.
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.
Carl Frederich Gauss was a preeminent early nineteenth century German mathematician and scientist. Among the many things named for him is the Gaussian distribution, also known as the normal distribution or the bell curve, which is very important in statistics. It also forms the basis of the gaussian_blur variation in JWildfire.
The blur variation generates a filled-in circle. Unlike most variations, which transform the plane by mapping input points to output points, blur completely ignores the input. The variations blur_circle, circleblur, and sineblur also generate filled-in circles. They differ in how the density is distributed across the disk. Blur has high density in the center, gradually decreasing towards the edge.