Jazz box or jazz square is a dance move seen in numerous dances of various styles, including line dance, novelty dances, jazz dance, disco, and hip hop. The name comes from its basic footwork: its four steps form a square pattern.
Jazz square:
Box step:
In particular choreographies, the pattern may start from any step of the sequence and may also be mirrored, i.e., started from the right foot.
Variants of styling are endless, including various arm and body movements, Suzie Q action on steps 1, 2, skips and hops at some or all steps, etc.