It has rules for interpretation meaning, language, and thought. And it uses a ethnography to find meaning. Symbolic Interactionism also meets the five humanistic standards that make a good theory. There is a new understanding of the people where we get meaning. There is a clarification of values.
Meaning comes from interaction, so interaction is important to human society.
There is a community of agreement - Blumer's ideas are adopted by people in the academic community. And there is a reform of society - because meaning comes from interaction, interaction must not be taken for granted. Although Symbolic Interactionism is a good theory by the five humanistic standards, there is a critique of the whole basis for it. That is, a social interactionist believes that meaning arises out of the interaction between people, while a contradicting point of view a asserts that meaning is already established in a person's psychological make-up. While it is debatable if Symbolic Interactionism is a good theory, or not, I find it effective in evaluating human interaction.