What is the advantage of using CSS preprocessors like SASS or LESS?

Using CSS preprocessors like SASS or LESS offers significant advantages by providing features that extend the capabilities of standard CSS. One of the key features is the ability to use variables, which allow developers to store values (such as colors, fonts, or any CSS value) in a single place and reuse them throughout the stylesheet. This not only streamlines the coding process but also ensures consistency across design elements since changes can be made in one location instead of multiple places.

Nesting is another powerful feature, enabling developers to write CSS in a way that reflects the HTML structure more intuitively. This hierarchical representation makes it easier to visualize and manage styles associated with specific elements without duplicating selectors.

Mixins add yet another layer of functionality by allowing developers to create reusable blocks of code. This way, complex styles can be encapsulated in a mixin and applied wherever needed, promoting code reusability and reducing redundancy.

These features together enhance maintainability and scalability of stylesheets, making it easier to manage larger stylesheets in complex projects.