Dadaists were the artists, writers, and performers behind Dada, an early-20th-century anti-aesthetic arts movement that began in Zürich around 1916 and spread to cities including New York, Berlin, Cologne, Hannover, and Paris. Britannica describes Dada as a nihilistic, antiaesthetic response born of disgust with bourgeois values and despair over World War I.
They did not share one painting style. Instead they favored chance, collaboration, satire, collage, photomontage, sound poetry, performance, and found-object “readymades,” challenging conventional ideas of what art could be. Figures linked with the movement include Hugo Ball, Tristan Tzara, Jean Arp, Marcel Duchamp, and others.
Source: Dada — Encyclopaedia Britannica