Less is a popular CSS preprocessor that extends the capabilities of CSS and makes it easier and more efficient to write and maintain stylesheets. It allows developers to use variables, mixins, functions, and other features that are not available in traditional CSS, and to generate complex stylesheets with less code. Similar to Sass, Less simplifies the process of creating and managing stylesheets, especially for large and complex projects.

One of the main advantages of Less is its simplicity and ease of use, especially for beginners. It has a simple syntax that is similar to CSS and requires little setup, making it a popular choice for many web developers. Less also supports a wide range of features, including nested rules, variables, and operators, which can help to improve the organization and structure of stylesheets.

Less can be used with any modern web development stack, including React, Angular, and Vue.js, and it has a large and active community that contributes to its development and provides support to developers.