Yep. As technology changes, so do the mediums by which advertising takes place (i.e. print -> radio -> TV -> online -> social). As long as there are imperfect

Yep. As technology changes, so do the mediums by which advertising takes place (i.e. print -> radio -> TV -> online -> social). As long as there are imperfect markets and unequal distribution of information, there will be advertising. How that advertising is performed will continue to change drastically over time.