Learn How to Knit the Popcorn Stitch. This video knitting tutorial will help you learn how to knit the popcorn stitch. This technique is used to create bobbles, which are little clusters of stitches that can be used to provide a bumpy texture to your knitted fabric. You can space them closer or further apart or stagger them to create all kinds of different patterns. They're often used in traditional aran sweaters, and are great for hats and scarves too.