The slip knot is a fundamental crochet stitch that forms the foundation for many other crochet stitches. It is a simple knot that is used to create a loop on the hook, which is then used to work the next stitch. The slip knot is also used to join yarn and to finish off a piece of crochet.
To make a slip knot, start by making a loop with the yarn. Hold the loop in your left hand and insert the hook into the loop from front to back. Catch the yarn with the hook and pull it through the loop. You should now have a loop on the hook.