The easiest way to describe it is saying that the effect shows a series of moving shapes and lines. These shapes are various, for instance, they can look like dots, triangles or polygons.
Particle Slider
The particles constantly move and interact with each other on the slider.
Video Block
Smart Slider 3 is a great tool to create nice video blocks with particles.
Particle Carousel
Carousel allows you to show more than one slide at a time.