Currently I have some presentations to prepare. So I looked at the word and I was curious as there seems something to be in it:

presentation – present – that’s a gift and also a state of mind and a moment in time and a location (pre = before)

So, a presentation, in my view, should be a gift and/or offering for those that come to see and listen, it should be engaging so people remain present at that moment and the speaker should be fully present in front of the audience.