A great presentation is like unwrapping a gift because you are continually anticipating what is inside ( what the outcome will be).
Once the gift is revealed there is that "aha" moment where you recognize the contents. This moment is either a surprizing delight or it is a disappointment ( why would my brother give my two year old a swiss army knife?).
The difference between a good gift and a bad one is relevance and presentation. A poorly wrapped gift thrown at someone at the wrong moment will not build the same anticipation and may fall flat.
Why is it that average ideas sometimes get attention and brillant ideas get ignored? It all comes down to relevance and presentation.
An idea gains traction when it is presented in a meaningful, relevant, and interesting ( even provocative) way. Creating a meaningful motivational speech is more than throwing ideas together. Compelling presentations have a clear purpose and a ebb and flow to them.
I would argue that if you are trying to influence anyone through any medium ( online communities, blog, newsletter, memo, meeting, motivational speeches, etc) you are presenting.
A great presentation will move the audience from where they are to where you want them to be. It will yeild powerful outcomes but only if you know what that outcome should be.
As a motivational keynote speaker I have learned through trial and error that a motivational speech must be relevant and well presented to have full impact.
Read: Motivational keynote speaker: Strategies to Avoid offending your Audience.