Sit-ins were a form of nonviolent protest used by Black civil rights activists in the United States during the 1960s. During a sit-in, participants would occupy a segregated public space, such as a lunch counter or bus station, and refuse to leave until they were served or their demands were met.

One of the most famous sit-ins took place on February 1, 1960, in Greensboro, North Carolina, when four Black college students from North Carolina A&T State University sat down at a whites-only lunch counter at a Woolworth's store and asked to be served. When they were refused service, they remained seated in quiet protest. The sit-in sparked a wave of similar demonstrations across the South, leading to the desegregation of many public facilities.

The success of the sit-in movement brought national attention to the struggle for civil rights and helped to galvanize support for the broader civil rights movement. Sit-ins were a powerful and effective tactic for challenging segregation and discrimination and played a crucial role in the fight for racial equality in the United States.