The third thing you have to think about with a presentation (once you've made it big enough for people to read, and clear enough for people to decide something) is making it coherent enough that they actually listen to what you're saying. This is not easy.
You can't just write stuff on some slides and talk. You have to actively manage their attention. Actively.
Think about the difference between a document/report and a presentation.
When someone's reading a report they're managing their own attention. They can scan a page and take in lots of points at once, they can flip back and forwards, they can skip some bits and focus on others. A document offers you tons of cues that let you know what kind of experience it's going to be and whether it's worth devoting time to it. How big is it? How dense is the type? Does it have pictures? Is it well laid out?
It puts people in charge of their own experience.
This is a good way to do things. Important Amazon meetings start with everybody silently reading tightly structured 6-page narratives before they decide the thing to be decided.
But the chances are that's not what you'll be doing. You'll be doing a presentation - so you'll be managing everyone's attention with, effectively, a series of posters.
These might be brilliant, individually, but people can't flip back and forwards and they can't refer to a chapter heading - so it's very easy for them to get lost. You need a clear, grokkable structure and you need to keep telling them where they are in it.
Otherwise you'll face an audience that's constantly thinking "How long is there to go? What are they talking about now? Has it nearly finished? Which bit is this? Is this the last bit?"
I often use a structure like this for public talks. I show this slide up front:
It helps people relax. Showing something like this demonstrates:
1. I've thought enough about this to realise that there are three sections. This suggests a certain base level of competence.
2. There are only three sections!
Then, as I go through the talk, I go back to this slide and make it clear where we are. Not at great length, don't beat them over the head with it. But enough to reassure people and help them remember where they are conceptually - and give them a clue about how much longer there is to go. Signalling you're conscious of their time is helpful.