SummerSlam is a professional wrestling pay-per-view (PPV) event produced annually in August by professional wrestling promotion WWE. Dubbed as "The Biggest Party of the Summer," it is one of the original "Big Four" pay-per-view events of WWE (along with WrestleMania, Royal Rumble and Survivor Series) and is considered the WWE's second biggest event of the year behind WrestleMania. The inaugural SummerSlam took place on August 29, 1988 at Madison Square Garden in New York City and was broadcast via pay-per-view. From 2009-2014, SummerSlam was held at the Staples Center in Los Angeles and from 2015–2018, the event took place at the Barclays Center in the New York City borough of Brooklyn.