A responsive design in web development refers to an approach that ensures websites function seamlessly across a variety of devices and screen sizes. By employing flexible layouts, adaptive images, and CSS media queries, responsive design allows content to adjust dynamically based on the user’s device. This is crucial in providing a positive user experience, as it enhances accessibility and usability on smartphones, tablets, and desktops. As mobile internet usage continues to rise, responsive design is increasingly important for improving search engine rankings and maintaining customer engagement. Ultimately, it helps businesses reach a wider audience by accommodating diverse access points.