Soap operas originated in the 1920s in the United States as radio broadcasts advertising soap powder to American housewives. They target primarily female audiences by airing after mealtimes and featuring traditional female roles, which affects the storylines, characters, and settings. Soap operas run continuously for years in the same time slots, becoming part of popular culture and how audiences see themselves. The relatable storylines allow audiences to empathize with or dislike characters as their interweaving plots overlap to maintain interest.