Garter stitch is a basic knitting stitch pattern that is made by knitting every row. It creates a stretchy, reversible fabric that lies flat and is characterized by little ridges that are created between each of the rows. Garter stitch is fully reversible, meaning that both sides look the same, which is essential for projects where both sides are visible, like a scarf. It is the first stitch that beginners learn when starting out with knitting. Garter stitch is great for beginners because it is easy to learn and very versatile. Once you know how to knit garter stitch, you can use it to create all sorts of projects, from easy hats and scarves to blankets and sweaters.

To work the garter stitch, simply knit every stitch of every row. When knitting flat, it consists solely of the knit stitch. On circular needles, add in a purl row for a 2-row repeat. Garter stitch is fully reversible, meaning that both sides look the same. In knitting patterns, garter stitch is sometimes abbreviated as "g-st" or "g st".

In summary, garter stitch is a basic knitting stitch pattern that is easy to learn and very versatile. It is made by knitting every row and creates a stretchy, reversible fabric that lies flat and is characterized by little ridges between each of the rows.