The ashcan school was a group of artists who were friends and liked to paint things that were not usually thought of as pretty or important, like dirty alleys, poor people, and working-class neighborhoods. They wanted to show what life was really like for regular people in the city, not just the fancy buildings and rich people that other artists painted. They used dark colors and bold brush strokes to make their paintings look gritty and real. Some people didn't like their paintings at first because they thought they were ugly, but many other people appreciated the honesty and thoughtfulness in the ashcan school's work. Over time, their style of painting became more popular and even influenced other artists in different parts of the world.