What does street art means?? Street art is art created in public places, often without permission. Street art is made in a number of mediums, including stencils, stickers, posters, paint, and sculpture. In mathematical, political, criminal, and philosophical terms, streetart is a subset of graffiti. So for those who are trully lovers of street art, here is the ultimate meca for you, Streetsy, a street art hunting website with daily updates on the subject.