Agenda-setting is a function of

Agenda-setting is a function of political communication.

It is the media's power to make issues salient and shape what the public thinks about, central to politics.

Legal communication deals with law and legal process, not the setting of public agendas.

Corporate communication manages an organisation's messaging, not the political agenda of society.

Grapevine communication is informal workplace rumour, far from the agenda-setting function.

By steering which issues gain attention, agenda-setting works within political communication.