Don’t cheat. “Search engine
optimization” can mean either mean “optimizing your
site for content focus and accuracy” or “trying to
convince engines that your poop smells like roses.” One is a
valid, effective, and ethical technique. The other is
sleaze, and search engines put a lot of money into making
sleazemongers suffer. Make sure you know the difference before
hiring an SEO specialist (or trying it
yourself).
http://www.strangebrand.com/14/google-dance-work-boxers.html