You decide what a presentation is supposed to do by naming the change you want in the room before you build a single slide. A presentation is not there to cover a topic or share what you know. It is there to move a specific group of people from where they are now to a decision or action you need from them. Everything else is in service of that, or it does not belong.

Most decks are built backwards. People start with the information they have, arrange it into sections, and hope a point emerges. It rarely does, because organizing what you know is not the same as deciding what you want. The deck ends up as a tour of your knowledge instead of an argument for a decision, and the room leaves informed but unmoved.

The discipline is to answer one question first: when this is over, what should be different? A budget approved. A direction chosen. A doubt removed. Once you know the change you are after, the deck almost builds itself, because every slide now has a job, which is to move the room one step closer to that change. Delivery is downstream of thinking, and this is the thinking that has to happen first.