The primary purpose of responsive web design is to create websites that provide an optimal viewing and interaction experience across a wide range of devices, from desktop computers to smartphones and tablets. Responsive web design aims to:

• Ensure consistent and accessible user experiences regardless of the device used to access the website
• Adapt the website's layout, content, and functionality to fit seamlessly on different screen sizes and resolutions
• Improve website performance and loading times on mobile devices
• Enhance search engine optimization (SEO) by providing a mobile-friendly website
• Future-proof the website's design to accommodate the ever-evolving landscape of devices and screen sizes

By implementing responsive design techniques, web designers can create flexible, scalable, and device-agnostic websites that deliver an optimal experience to all users.