Newbie, some types of knitting, lace knitting, for example, requires several differently marked markers. There are different types, from the little plastic ones, to beaded whole rings, to some that look like hooks. If you want to get really fancy, you can make them with Swarovski crystals from a bead shop. I priced doing that yesterday, and it's much less expensive than I thought.
For anyone who wants to mail order the components to make your own, try this site, they're wonderful and have great customer service. When I told the woman what I wanted to make, she got all enthused and told me about her latest knitting project.