How do you use dynamic content and personalization tags in your emails?

You've provided a comprehensive guide to designing responsive email templates! Starting with a responsive framework or platform, optimizing for mobile-first, and utilizing single-column layouts are foundational steps for ensuring compatibility across devices. Implementing fluid design elements, media queries, and image optimization further enhance adaptability, while testing across devices and clients ensures consistent rendering. Iterative optimization based on performance data and subscriber feedback is key to continuously improving the user experience. Great job!