When you've worked up something quickly, for instance a baby blanket or a double crochet or v-stitch scarf...or even a dishcloth...an easy way to fancy it up is with a small shell edging. Attach yarn at any stitch with a slip stitch,chain 3, make 1 double crochet into the same stitch, skip two stitches below and make 1 single crochet and 2 double crochet into the next stitch. Complete this all the way around and, voila, as easy as that, you've got a lovely looking shell edging.
Sometimes, as beginners, our first items turn out a little bit wonky. Adding an edging can "save" the piece from looking like a first attempt and give it a touch of elegance. Hey, we all have to start somewhere...and it is nice to have a way to "fix" something if it doesn't turn out exactly as expected. Happy crocheting to you.