The foundation of any presentation is its content. And your messages and core statements provide a structure for this content. They need to be phrased clearly and unequivocally.
The factual information in the presentation is supplemented with pictures, analogies, comparisons and stories. Storytelling is a way of substantiating and illustrating the abstract level of fact through a vivid narrative. Experiences from your own personal life or work processes, or even from short breaks, turn facts into pictures people can understand. The audience can identify with them, as they tie in with their own personal experiences.
Using storytelling means strengthening contact with the audience. Stories bring the presentation to life. Listeners feel they are being spoken to personally, and become motivated and curious about the presentation and speaker.