Hayley Plybon and Clayton Howard
Full Employment occurs when all of those who are willing to work are working. An economy needs to provide jobs for its people so they can support themselves and their families and produce output for others. Having as many jobs provided and occupied as possible is key to optimizing an economy's effectiveness.
The above picture is of Harry Truman signing into effect the Employment Act of 1946. This act formally outlined the government's responsibility to pursue as high an employment as possible. Pursuing full employment is in the best interest of both the government and the people it serves.