Final answer:
A message meant to educate the public on health or any other issue is referred to as a public service announcement.
Step-by-step explanation:
A message created to educate people about an issue is called a public service announcement (PSA). PSAs are used for various public health campaigns to raise awareness about issues like smoking and often include government health notices, such as the surgeon general's warning on cigarette packaging. Governments sometimes pass laws to enhance these educational efforts, requiring such notices to be clearly displayed to inform the public about health risks such as those associated with tobacco use.