Visuals, such as images, GIFs, and videos, can make emails visually appealing and engaging. However, overusing visuals can lead to several issues. First, they can increase the loading time of emails, especially on mobile devices with slower internet connections. Second, emails with too many images might be flagged as spam by email service providers, reducing your deliverability rate. Finally, excessive visuals can distract from your core message, leading to lower engagement and conversion rates.