bootstrap-sass integrates Bootstrap's CSS framework with the Sass stylesheet language. This npm package enables developers to leverage Bootstrap's responsive grid system, components, and utilities within a Sass-based workflow. By using bootstrap-sass, you gain the benefits of Bootstrap's pre-built functionality combined with the flexibility and power of Sass, including variables, mixins, and nesting, enabling easier customization and maintenance of your project's styles. It simplifies front-end development while promoting clean and organized stylesheets.