Engaging your audience is more than just having some graphics on screen or "cool" animations playing. You need to make them personally invested in what you have to say, and the best way to do that is by relating your content to them.
The best way to relate your content is by personalizing it with a name of someone in the crowd. Make what you're saying applicable to real life and allow the audience to imagine as if it was them. Don't know someone in the audience? Just ask. Be interactive and the audience will stay on their toes.
Here are the top ways to relate to your audience:
#1: Personalize your content with an audience member's name
#2: Use stories to convey your information
#3: Point to someone in the crowd
#4: Use the word "You"
#5: Use metaphors to make information more understandable