The slip stitch is a handy little stitch to know. So quick and simple it's often overlooked when teaching someone to crochet! But it's very important, and there are many times when no other stitch will do. It closes up circles, it adds great edgings, it can join seams, it's the basis of surface crochet, and it gets you from point A to point B without cutting the yarn. Let's watch:
How to Crochet the Slip Stitch: Right Handed Version
How to Crochet the Slip Stitch: Left Handed Version
As you can see, it's like a chain worked into another row... or like a single crochet without the yarn over. So easy and quick! The slip stitch is used in the vast majority of patterns out there, so learning it is important - even if it's just to make the seamless join.
Another reason to take a closer look at slip stitches is the increasing popularity of slip stitch crochet. More than just a normal slip stitch, these slip stitches twist and bend and use the back loop and front loop only to create amazing new patterns and looks! I have only just begun to learn about this technique myself, but if you're interested in learning more, be sure to check out A Yarnified Life. David Burchall's site really lays out everything you can do with slip stitch crochet, featuring stitches, patterns and tutorials I've never seen anywhere else. David also has patterns for sale on Ravelry, and though they are crochet they look so much like knitting it's hard to believe! Which just goes to show - there's more than meets the eye in crochet. Even when it comes to the humble slip stitch!