Final answer:
The three basic categories of public information are print media, broadcast media, and the Internet; all play essential roles in informing the public about political and governmental matters. Campaigns use these media forms for effective message targeting.
Step-by-step explanation:
The three basic categories of public information are print media, broadcast media, and the Internet, along with action messages. These forms of media play a crucial role in how the media informs the public, especially concerning politics and government. Mass media encompasses traditional media outlets like newspapers, television, and radio, designed to reach large demographics. With the evolution of technology, the Internet has become a predominant source for many to receive news and updates.
Furthermore, political campaigning often leverages these forms of media to shape message targeting, using tools such as polls and focus groups to identify the issues that resonate with potential supporters. Campaign messages are then crafted into concise formats such as 30-second sound bites, which are more likely to be covered by media and easier for the public to digest.