After world war ii, artists began to rethink the relationship between life and art and explore artforms beyond the representational and the narrative. one result was abstract expressionism, which was essentially:

one result was abstract expressionism, which was essential: A Culmination of All of the Movements Specified.
In creating the artworks, the artist with abstract expressionism often produces artworks without any conventional form.
These type of artworks encourage the viewer to fully analyze the art in order to get the true perception of the art.