A "public bulletin" refers to a notice or announcement that is made available to the general public. It can contain important information, updates, or announcements about various topics or events that people should be aware of.
They place ads in newspapers, on television, on radio, on public bulletin boards, and in stores. (njsrn.org)
In a number of municipalities, prolife groups are prevented from putting up their materials on public bulletin boards because it is «too controversial.» (firstthings.com)
Post lost pet signs in your neighbourhood at convenience stores, supermarkets and on other public bulletin boards. (stjohns.ca)