Exhibiting a concern for a social issue before the public by some organized symbolic activity either in protest of an injustice or deficiency or as an example of alternatives or what could be done to make improvements.
Demonstrating raises social consciousness by representing, often before mass media, an issue which is felt to be of concern to all.
Demonstrating is effective in influencing social opinion, but it rarely provides practical solutions.
Demonstrating is only useful in regard to those issues which can be visibly enacted, leaving concerns of a more intangible nature untouched.