LESS is an innovative, dynamic style sheet language that extends CSS with dynamic behavior such as variables, mixins, operations, and functions. Developed to save time and effort, LESS brings a wealth of options for developers looking to streamline and enhance their CSS writing. In the world of web design and development, LESS is renowned for its flexibility and efficiency. Variables allow you to specify widely used values in a single place, and then reuse them throughout the style sheet, making global changes as easy as changing one line of code. Mixins, on the other hand, let you include ("mix in") all the properties of one class into another, making your code reusable and less cluttered. Operations and functions open the door to creating complex relationships between properties and values, making your CSS dynamic. Plus, the ability to nest rules in LESS mimics the way HTML is written, making style sheets more readable and easier to maintain. The real power of LESS lies in its ability to streamline and simplify CSS development. It enables more efficient design practices, allowing developers to write less code and achieve more. LESS is used in a broad range of applications, from simple websites to complex web applications. It's a tool that can truly transform the way you approach CSS, making your development process faster, easier, and more efficient.