S.P.E.W. stands for the "Society for the Promotion of Elfish Welfare." It is a fictional organization created by J.K. Rowling in the Harry Potter series. The group advocates for the rights and better treatment of house-elves, magical creatures who often work in servitude without pay or proper care. Founded by the character Hermione Granger, S.P.E.W. aims to raise awareness about the exploitation of house-elves and promote their freedom and dignity. The organization highlights issues such as unfair working conditions and the lack of rights for house-elves, encouraging others to support their cause.