👉 The RSS (Really Simple Syndication) fluid is a CSS (Cascading Style Sheets) property used to create responsive, flexible layouts that adapt to different screen sizes and devices. It allows developers to define content areas that can be sized proportionally, ensuring that text, images, and other media elements scale smoothly across various resolutions. By using the `fluid` keyword in conjunction with percentage values or other flexible units, content can expand or contract to maintain readability and visual harmony, enhancing the user experience on everything from desktop monitors to mobile phones.