social art, n., /soʊʃ(ə)l ɑrt/ artistic projects that live within the social realm, within a global and/or local community, through tighter interaction between art, artist and audience. The audience reception, response, and interaction becomes an integral part of the art itself. Social media can play an important role in the social art process, but I do not consider it a defining factor at this point.
Social art is independent art that is created in a tighter social context, in interaction and at times even cooperation with the audience. It often exists online and is fueled by and through social media, but i think it also exists in smaller, local contexts (think about the small local-fame band of your hometown, that partakes in many local events or even initiates and organizes little events for the community itself, etc.). No matter if global or local, it lives from the authenticity, transparency and availability of the artist, who isn't some ethereal, elevated creature, but a real human who is a part of the community that creates itself around the art.
Social art is a product of our time, to some extend because thanks to technological advances, independent art is actually somewhat affordable, because the emergence of social media makes a tight connection and dynamic interaction possible regardless of geographic distance, and because (and this is just a theory as of now) because it represents the ideas, world-view, and social needs of our generation (the internet generation, the network-kids, or even Gen Y / Millennials, and Gen Z).
Questions/Comments? Hit me up! This definition is a work in progress that still needs much clarification.