Salsa music is a fusion of traditional African and Cuban and other Latin-American rhythms that traveled from the islands (Cuba and Puerto Rico) to New York during the migration, somewhere between the 1940s and the 1970s, depending on where one puts the boundary between "real" salsa and its predecessors. There is debate as to whether Salsa originated in Cuba or Puerto Rico. Salsa is one of the main dances in both Cuba and Puerto Rico and is known world-wide. The dance steps currently being danced to salsa music come from the Cuban son, but were influenced by many other Cuban dances such as Mambo, Chá, Guaracha, Changuí, Lukumí, Palo Montel, Rumba, Yambú, Abakuá, Comparsa and some times even Mozambique. It also integrates swing dances. There are no strict rules of how salsa should be danced, although one can distinguish a number of styles, which are discussed below.

Salsa is a slot or spot dance, i.e., unlike Foxtrot or Samba, in Salsa a couple does not travel over the dance floor much, but rather occupies a fixed area on the dance floor. In some cases people do Salsa alone.

The basic movement occurring in the dance patterns of the various salsa styles is the stepping on the beat of the music. Salsa is best grouped in pairs of 4-beat patterns counted "1-2-3-...-5-6-7-...". As a standard, every step must be taken with full weight transfer.

Normally Salsa is a partner dance, danced in a handhold. However advanced dancers always include shines, which are basically "show-offs" and involve fancy footwork and body actions, danced in separation. They are supposed to be improvisational breaks, but there are a huge number of "standard" shines. Also, they fit best during the mambo sections of the tune, but they may be danced whenever the dancers feel appropriate. They are a good recovery trick when the connection or beat is lost during a complicated move, or simply to catch the breath. One possible origin of the name shine is attributed to the period when non-latin tap-dancers would frequent Latin clubs in New York in the 1950s. In tap, when an individual dancer would perform a solo freestyle move, it was considered their "moment to shine". On seeing Salsa dancers perform similar moves the name was transposed and eventually stuck, leading to these moves being called 'shines'.

Salsa styles

There are many characteristics that may identify a style. There may be different step patterns, different timing of steps, particular movement on the dance floor (ex: slot, circular), dancer preference of turns and moves, attitude and others. The presence of one or more of particular elements does not necessarily define a particular style. For example, many styles can be danced "On One" or one style may be danced "On One" or "On Two". The following are brief descriptions of major "recognizable" styles.

New York style or Eddie Torres style

The "NY Style" is a combination of the "On 1" and "On 2" systems. The timing of the steps are on the 1-2-3,5-6-7 as in "On 1" but the breaks (where the body changes direction) occur on the 2 and 6 as in "On 2". NY instructor Eddie Torres developed this step pattern around the late '70s and the '80s, and its definition is quite clear as he is still alive and his followers are keen to keep the style intact. There are many "socials" in NYC or nightclubs that dedicate on playing only mambo or salsa.

The style has proliferated around the world to places like Poland, Japan, Korea, India, Israel, Germany, Holland, Canada, Hawaii, Poland, Romania, UK, Curacao, and more.

Los Angeles Style ( LA style)

Developed in recent years (some say between 1999 and 2002), this is a style of salsa much influenced by Hollywood and by the swing & mambo dances, thus being the most flashy style, which is considered "more show than dance" by many. The two essential elements of this dance are the forward/backward basic as described above, and the cross-body lead. In this pattern, the leader steps forward on 1, steps to the right on 2-3 while turning 90 degrees counter-clockwise (facing to the left). The follower then steps forward on 5-6, and turns on 7-8, while the leader makes another 90 degrees counter-clockwise. After these 8 counts, the leader and follower have exchanged their positions.

Cuban Style

Cuban-style salsa can be danced either "on one" or "a contratiempo" ---the latter is often referred to as "on two". An essential element is the "cuba step" (also known as Guapea), where the leader does a backward basic on 1-2-3 and a forward basic on 5-6-7. The follower does the same, thereby mirroring the leader's movement. Another characteristic of this style is that in many patterns the leader and follower circle around each other.

The cross body lead is an essential step in this style too and is referred to as Dile que no. This move becomes essential in the more complex derivative of Cuban Casino leading to the many moves of Rueda, or wheel dance. Here multiple couples exchange partners and carry out moves syncronized by a caller.

Rueda de Casino

In the 1950s Salsa Rueda (Rueda de Casino) was developed in Havana, Cuba. Pairs of dancers form a circle (Rueda in Spanish), with dance moves called out by one person. Many of the moves involve rapidly swapping partners. In the Philippines 2005, a growing interest among young Filipinos led to to a fusion of salsa and community dance, later called Ronda de Salsa, a dance similar to Rueda but with salsa dance moves that were choreographed locally and in Filipino names.