👉 The HTML `fluid` attribute is used to create flexible, responsive layouts within web pages. It allows elements to scale proportionally based on the available space, ensuring that content adapts smoothly across different screen sizes and devices. By setting `width: '100%'` in conjunction with `fluid`, the element's width becomes a percentage of its parent container, making it fluid. This approach is particularly useful for creating layouts that maintain visual harmony and readability on desktops, tablets, and mobile devices alike.