They are also used to join crochet circles when working in rounds, to add decorative elements to any basic crochet fabric, or to join different pieces of crochet fabric together. It is abbreviated to "ss sl" in crochet patterns.
1. Insert the hook into the next stitch.
2. Yarn over. Wrap the yarn around your crochet hook.
3. Pull the yarn through two loops to complete. You are finished!
4. Finally, insert your hook into the next stitch. You have now completed a row of slip stitches!