Mary Quant was a pioneering British fashion designer who revolutionized 1960s fashion. She opened her first boutique, Bazaar, in 1955 in London, where she sold her affordable and youthful designs like the mini skirt and hot pants that came to define the era. Quant brought fashion to the masses and is credited with popularizing styles like go-go boots and shift dresses. She continued designing and expanding her brand for decades, leaving a significant impact on global fashion.