Selecting a Topic
The first essential thing about choosing a topic is to understand your audience, except in a business scenario where presentation topics are often determined by the current needs of an organization or its executives. Because a presentation has the aim of explaining or demonstrating some particular thing to others, it is important to focus on a topic that an audience needs to know about rather than something that appeals personally to you.
However, this principle does not work well when someone is asked to create/deliver a presentation as a school or college assignment. In these cases, you may choose any topic you desire. However, there is one important consideration i.e. it is best to select a topic that relates to your studies or one that you feel passionately about. If you do not, there is a danger your speech/presentation will be unconvincing, lacking in-depth, or even boring.