"SYMBOLIC INTERACTIONISM IS 'SYMBOLIC' BECAUSE IT FOCUSES ON THE MEANINGS GIVEN TO SITUATIONS BY THE ACTORS INVOLVED AND IT IS "INTERACTIONIST" BECAUSE MEANINGS ARE GIVEN TO SITUATIONS THROUGH INTERACTIONS BETWEEN ACTORS"
This really does not answer the question. To point a little bit more in the correct direction of a better answer, versus simply spouting something that doesn't answer your question, Symbolic Interactionism is a sociological theory developed by George Herbert Mead. His student, Herbert Blumer, coined the term.
As far as other facts, it was born out of American Pragmatism and
has received a lot of criticism for being too grand of a theory.
Some people say that it isn't a real theory. However, it meets at
least 1 out of 3 criterion for a "useful" theory. These criterion