What is ephemera?
Ephemera is the collective name given to material which carries a verbal or illustrative message and is produced by the printing process, but is not a standard book or periodical format.
A general description of the material in these files is that they are usually flimsy or insubstantial. They are documents produced for a specific purpose and were not intended to survive. Material can be of a social, cultural, commercial and official nature. These files include invitations, programs, newspaper clippings etc.
From "Ephemera", by Chris Makepeace, 1985