Lichtenstein masterfully reinterpreted lowbrow sources like comics and advertisements, elevating them to the realm of high art. His works often played with irony and satire, commenting on consumerism, media, and the conventions of art itself. By appropriating and recontextualizing familiar imagery, Lichtenstein questioned the notions of originality and authorship in art, making a lasting impact on the 20th and 21st century art world.