Ty Swartz discusses the principles of visual design in this episode of SnapLenz. He highlights the importance of balance, contrast, hierarchy, emphasis, and unity in visually appealing content. Swartz emphasizes the need for designers to consider how they guide viewers through their design, establish hierarchy, emphasize key elements, and maintain unity in their overall message. He also touches on the significance of using visual elements to tell a story and engage the audience, ultimately aiming to inform, educate, and entertain viewers. In the next episode, Swartz plans to delve into the design process to explore further how to create engaging and impactful visual content.