Find the best healthcare provider in your area

Really great way to find doctors and book them online.
Can anyone explain what "best" means?
LOL @jtriest, I think @AlokVasudev was asking something closer to "what data goes into Opencare's vetting process/algorithm?" Doesn't seem to be in Opencare's website (or Merriam Webster) ;) If any Opencare peeps want to meet up and talk healthcare quality/vetting, I'd love to chat. (And we're just a few blocks away)
Looked at the website but still I dont get what the "Open" stands for in Opencare? Is the data available in public domain?