This technique is used in patterns for the tiny narwhal, the Thwickeds and the tiny parrot, among others.
This technique is a super easy way to bind off live stitches for a neat seam that grafts the stitches together. It’s a common knitting technique, but I’m sharing a tutorial of my own because my technique is different from most. (I don’t turn the knitting inside out first, because most of my patterns are constructed out of closed shapes that can’t be turned right side out again.)