Jackson Pollock was an American abstract expressionist artist known for his unique style of drip painting. Pollock's innovative technique involved pouring and dripping paint onto canvas, creating dynamic and energetic compositions. His large-scale works, such as Autumn Rhythm and Number 1, 1950, showcased his mastery of gesture and movement. Pollock's art was a reflection of his inner emotions and a way to explore the subconscious. His contributions to abstract expressionism have had a profound influence on the development of modern art.