30363 Jet-Ski is a 34 piece City promotional set with 1 minifig released in 2019.
Part of the LEGO City Theme. The LEGO City theme is based on city life with the sets depicting city and emergency services, police, fire, airport, train, construction, and civilian services. The City theme proceeded LEGO Town which was replaced with LEGO World City in before it was rebranded as City in 2005.