The dominance of mobile devices cannot be overlooked in the realm of email marketing. With a significant percentage of emails being opened on mobile devices, optimizing emails for mobile viewing is critical. This includes using responsive design, concise subject lines, and ensuring that the content is easily scannable. Additionally, mobile-specific features like one-click actions (e.g., RSVP, purchase) are becoming more popular, making it easier for recipients to engage with the email without needing to switch devices.