Guerilla art is art made with the intention of surprising and/or inspiring people. It may be paintings, sculptures, installations or anything else made of any materials. Usually it is made in public spaces, or places that people don't normally expect to find art. It is a way for artists to express their creativity, and share their messages with the world. It is often used to bring attention to different social and political issues. A famous example of guerilla art was when the artist Banksy made graffiti all over the city of London. People were surprised and delighted to find art in unexpected places.