It's not just Granny Squares, it's a life skill . . .
It involves lots' of patience, while knotting yarn, string, thread, or even metal wire using a small hook. Unlike knitting; crochet only uses a single hook. Crochet can be done freeform or following a pattern to create a broad range of items such as blankets, fashion accessories, toys, and even home goods. There are various techniques originating from many different regions that give unique styles.