(knitting) What is a seed stitch?

[pumpsnail.livejournal.com]

(from Knitting.about.com)
"My project knit in stockinette rolls in. Did I do something wrong?
You did nothing wrong. This is simply the nature of the fabric produced by stockinette. If you are knitting something that will be seamed, such as a sweater, it will be fine once you have sewn the pieces together. If you are knitting a piece that will not be seamed, such as an afghan or a scarf, then you don't want it to roll but rather it should lie flat. Try putting an easy seed stitch border around it and it will lie flat."

The answer links to this page...I can handle that pattern, but what am I supposed to do with it? A *border*? Huh?

I think this is my third post in two days or something, but I'm just feeling quite crafty this weekend! Hooray!

On an unrelated note, I did end up using black nail polish on the buttons on my cassock and it looks wonderful. Thanks for all the suggestions, girls! (and guys!)