The Open is now one of the four majors in golf, along with the U.S. Open, PGA Championship, and Masters Tournament. The term "major" is a universally-acknowledged unofficial term used by players, the media, and golf followers to define the most important tournaments, and performance in them is often used to define the careers of the best golfers. There is often discussion amongst the golfing community as to whether the Open, U.S. Open, or the Masters Tournament is the most prestigious major, but opinion varies (often linked to nationality). The PGA Championship is usually seen as the least prestigious of the four.