"Is your site responsive?" If you've ever spoken to a web developer or an agency, you'll have heard the word. But what does it really mean, and why has it become a basic requirement in 2025?
What "responsive" means
A responsive website is one whose layout adapts automatically to the size of the screen it's displayed on. On a desktop, you see a wide, multi-column version. On a tablet, the layout rearranges itself. On a smartphone, the content stacks into a single column, the buttons are large enough to tap with a finger, and the text is readable without having to zoom in.
It's the same site, the same code, but it reshapes itself intelligently to suit the context.
Why it's non-negotiable
More than 60% of global web traffic now comes from smartphones. If your site doesn't display properly on mobile, you're giving the majority of your visitors a poor experience. And that's not all: since 2019, Google has used the mobile version of your site to decide how to rank you in its search results. A site that isn't responsive is a site that ranks badly.
Responsive doesn't mean "done well on mobile"
This is the most common mistake. A site can technically be responsive, meaning the content adapts to the screen, and still offer a mediocre mobile experience. Text that's too small, not enough space between tappable elements, oversized images that take an age to load, a menu that's fiddly to use with a finger.
Being responsive is the bare minimum. Being well designed for mobile is the real goal.
A responsive site adapts to the screen. A site that's well designed for mobile adapts to how it's used.
If you're not sure whether your site is responsive, open it on your smartphone and ask yourself one question: would I actually read this content on this screen? If the answer is no, it's time to act.