First, let's look at how information about events happening around us is typically reported.
An event takes place.
The initial report of the event is broadcast on the Internet and TV, radio, newspapers etc.
Information about the event is published in the form of magazine articles. The articles will contain the results of a depth of research corresponding to the passage of time since the event. (Weekly magazines: a week after. Monthly magazines: a month after).
Comprehensive information is published in the form of books. (A year or more after the event).
Important events will be processed and categorized into entries in reference books, textbooks or handbooks.
Let us consider what types of information your reports or presentations call for. Thinking about the time required to produce information through each distribution method will help to give you a general idea of which kind you should use.