If you’ve expected to address an audience that you aren’t familiar with, it can be difficult to connect with your audience and build a rapport.
Ask the organizer for the names of a half dozen people who will be in the audience.
Contact them and find out about their backgrounds and their expectations for your presentation.
Thank them when you start your speech.
Doing this homework, identifying the specific requirements, and customizing your presentations will impress the audience. Whatever the topic, audiences respond best when speakers personalize their communication.