autodidact opinion
Social Media is a short-route, un-gate-keeped form of mass media.
Its function is to circumvent traditional mass media (journalism is making public, fotos and videos come right from the event without relevance criteria, etc.)
It also functions as an observer/controller of mass media itself (re-entry).
Its necessity results from the incompleteness of traditional media which relied on the economy and political systems, a circumstance holding mass media in an incomplete differentiation. Mass media's limited structures also limited their observer and explainer capacities.