To have a more impactful presentation for your audience it is important that you backup your storyline. For the key points that you want to make you should incorporate some kind of backup / evidence in your presentation.
For example you can make reference to authoritative study results or literature. You may also show a picture or an easy to understand graph to backup your story.
There are many ways to backup your story. Make sure to incorporate the right level of backup in your presentation to proof your point and make an impact on your audience.
