What do you mean, shanr?
The Voronoi Texture Node has been changed a bit from 2.80 to 2.81. Is that what confuses you?
Here is some information about Voronoi. Even if you don’t understand (all of )it, some of it will stick and will help you understand it better in the future…
https://blog.cgcookie.com/forums/topic/uvs-texture-colour-map-still-required/
