Good presentation skills and public speaking require multitude of skills; creativity, storytelling, creative slide design, engaging attitude, emotional content, effective non-verbal gestures and so on. Apart from good slide design, it is also important for presenters to focus on delivery skills to properly showcase what they show in the slides.
The modern practice of delivering presentations strongly encourages the use of images in slides. Hence, a presenter must be capable of showing an image and then deliver a key related message while the image is shown while using hand gestures, meaningful body posture, expressive arm placement and other non-verbal signals.
This exercise helps delegates to focus on this specific area and practice the skill.