uh, it means that you have to have a "wifi" enabled device to connect to the internet at that particular spot. If you don't know if your device if wifi enabled or compatible, I can't help you anymore. Good luck.
Hey prick, uh I mean elitist-prick... The asker is asking this question because certain devices are advertised as being "the wi-fi only" model... It's the word "only" that is causing the confusion here, and your answer is irrelevant and most unhelpful.