4chamss:
Welcome to 4chams.tk!: What is an imageboard?
I will refer you to the Wikipedia on that one: "An imageboard or image board (also chan, which is short for channel) is a type of Internet forum that revolves around the posting of images. The first imageboards were created in Japan, and many English-language imageboards today are centered around Japanese culture. They are based on the textboard concept." From Wikipedia