Ephemeral art is the name given to all artistic expression conceived under a concept of transience in time, of non-permanence as a material and conservable work of art. Because of its perishable and transitory nature, ephemeral art does not leave a lasting work, or if it does – as would be the case with fashion – it is no longer representative of the moment in which it was created. In these expressions, the criterion of social taste is decisive, which is what sets the trends, for which the work of the media is essential, as well as that of art criticism.

Art intervention is an interaction with a previously existing artwork, audience, venue/space or situation. It is in the category of conceptual art and is commonly a form of performance art. It is associated with Letterist International, Situationist International, Viennese Actionists, the Dada movement and Neo-Dadaists. More latterly, intervention art has delivered Guerrilla art, street art plus the Stuckists have made extensive use of it to affect perceptions of artworks they oppose and as a protest against existing interventions.