Web Fluid is a design approach that allows web applications to adapt seamlessly to different screen sizes and devices. It focuses on creating flexible layouts that can adjust their size and arrangement based on the user's device, whether it's a smartphone, tablet, or desktop computer. This ensures a consistent and user-friendly experience across various platforms. The concept of Web Fluid is often implemented using responsive design techniques, such as fluid grids and flexible images. By utilizing CSS media queries, developers can create websites that automatically resize and rearrange content, making it accessible and visually appealing for all users.