Salsa is a syncretic dance form with origins from the Cuban Son (circa 1920s) and Afro-Cuban dance (specifically Afro-Cuban rumba).
It is generally associated with the salsa music style, although it may be danced under other types of tropical music.
Salsa is normally a partner dance, although there are forms such as a line dance form "Salsa suelta", where the dancers dance individually and a round dance form "Rueda de Casino" where multiple couples exchange partners in a circle. Salsa can be improvised or performed with a set routine.
Salsa is a popular social dance throughout South America as well as in North America, Europe, Australia, and some countries in Asia and the Middle East.