Your message should endure long after your presentation. What is it that you want others to repeat when they leave the room? For someone to hear a message from you, and then have the capacity to tell others, it must be a message that is easy to receive, remember, and repeat.
When presenting, you are probably trying to persuade someone to respond. It might be to think differently, feel another way, or purchase something. Some of the decision makers may not be in your audience. For someone to be your advocate, they must be able to go out and repeat your message.
You can say something like, “The most important point to remember is…” or, “If you remember just one thing today, make it…”
It will be easier to remember if you keep it clear and concise.