User: What is the PGA Championship?
Assistant: The PGA Championship (often referred to as the US PGA Championship or USPGA outside the United States) is an annual golf tournament conducted by the Professional Golfers' Association of America. It is one of the four men's major championships in professional golf.

It was formerly played in mid-August on the third weekend before Labor Day weekend, serving as the fourth and final men's major of the golf season. Beginning in 2019, the tournament is played in May on the weekend before Memorial Day, as the season's second major following the Masters Tournament in April. It is an official money event on the PGA Tour, European Tour, and Japan Golf Tour, with a purse of $11 million for the 100th edition in 2018.

In line with the other majors, winning the PGA gains privileges that improve career security. PGA champions are automatically invited to play in the other three majors (Masters Tournament, U.S. Open, and The Open Championship) and The Players Championship for the next five years, and are eligible for the PGA Championship for life. They receive membership on the PGA Tour for the following five seasons and on the European Tour for the following seven seasons. The PGA Championship is the only one of the four majors that is exclusively for professional players.

The PGA Championship has been held at various venues. Some of the early sites are now quite obscure, but in recent years, the event has generally been played at a small group of celebrated courses.