The information function of mass communication is described as

The information function of mass communication is described as surveillance, the watching and reporting of the environment.

In Lasswell's terms, media scan society and warn of threats and opportunities as news.

Diffusion refers to the spread of innovations, not the naming of the information function.

Publicity is about drawing attention to a cause or product, a promotional rather than informational role.

Diversion is the entertainment function that offers escape, distinct from surveillance.

Surveillance keeps the audience informed about events near and far.