In 2010, Ethan Marcotte introduced responsive design as a method in one of his articles and gave it its name. In 2011, he detailed this concept further in his published book.

What Is Responsive and What Is It Used For?

A website designed with responsive structure automatically adapts itself to the screen of the device it is viewed on, such as phones, tablets, desktops, and laptops. This ensures that the site appears properly on every device and provides a comfortable user experience.

Google has also emphasized the importance of responsive websites, directing all site owners to adopt responsive design for better performance and ranking.