Looms are to crocheters/knitters what easels are to painters: you don't necessarily need them for every project, but they help you accomplish your work faster and more easily. The knitting loom will guide your needle and yarn with dexterity to where it needs to go.
In this tutorial, Mikey will show you how to make loom knitting socks. This sock craft is pretty quick and easy. Understanding the heel formation is the challenge. This video will take you through each step slowly showing you what to do.