Announcement text : a written statement about information that aims to be known by the public or the general public. The text should be brief and explain what, when, where, and who. Sometimes it also explains why and how.
The purpose is to inform the announcement text information about an event, job vacancies, new enrollment, new admissions, and so on.
Generic Structure Announcement :
Title : the title is the part that you cannot skip. Titles are useful for grabbing the attention of your audience so they read the entire announcement you make.
Explanation : explain in detail the title that you have provided. Usually the explanation consists of several parts, including ; type of event, date and time, place, participant, address.
Source : https://www.ilmubahasainggris.com/announcement