This video shows how to purl. Knit, and purl are the main staples on how to knit. A continued knit stitch makes what is called the garter stitch pattern. The knit stitch one direction, with the purl stitch on the returning direction makes what is called the Stockinette stitch pattern. Are you confused? ( The light turned on one day and I understood. ) Which is the main pattern that you see on most garments.