When working in patterns you will see slip stitch abbreviated as sl st. This stitch is used to join stitches that are worked in rounds (like a granny square). Now let's move on the to fun part and learn how to slip stitch in this super easy to follow tutorial from our friend Nikki Loud!
Work into next stitch
Yarn over and pull yarn through the stitch
Pull up stitch and turn hook so it is facing downwards
Pull through stitch and your slip stitch has been made!