I'm not familiar with them but they are only going to ad a META line for keywords to your website to make it searchable by any and all search engines.
here is a sample of this from my fishing website... Note: it starts with a "<" and ends with a ">"
meta name="KeyWords" content="surf fishing page, surf, shore, beach, fishing, bank fishing, Big Shell, bluefish, red drum, hobbies,Manuel Z, Saltwater, Malaquite, beach, Bob Hall, port, Aransas, Corpus, Christi, Padre Island, surf, weights, spider weights, bait, 4X4, Pendulum, redfish, black drum, Spec, speck, speckled trout, blacktip, shark, tarpon, throw net, popping cork, tackle, tips n tricks, cuts, bars, guts, fishing calendar,
eel, gafftop, hardhead, croaker, net, driving, sand, slider, port aransas, mustang island, read, reading the surf, how to, how-to, how-to's"
I don't think there is a limit to how many keywords you can use but use everything and anything that has anything to do with your services. Use words like "screw, nail, butt joint,...etc"
It's cheaper just to make your own website by buying frontpage express and adding the above line with your keywords and paying a small monthly fee for someone to host your
www.lawndart.com website.
But seems you are already comitted to them with the deposit. Maybe this info will help the next guy.