A formal announcement should include the invitation purpose such as the details of your Ghoshna (Event, Things, Message, Information ), including the day, date, event time, place, and other essential information.
Create ghoshna with multiple type - Normal message, Story, PDF
Manage particular group for ghoshna, create group to share ghoshna only with group people
Create time, at what time you want to broadcast the ghoshna.
Location wise head authority and portal admin to manage the applications