Webpack
Webpack is a static module bundler for modern JavaScript applications. It processes an application's source code by building a dependency graph that maps every module your project needs and generates one or more bundles. It is highly configurable and supports features like code splitting, loaders for processing non-JavaScript files, and plugins for advanced optimizations.
Developers should learn Webpack when building complex front-end applications that require efficient bundling of JavaScript, CSS, images, and other assets, especially in single-page applications (SPAs) or projects using frameworks like React or Vue.js. It is essential for optimizing performance through features like tree shaking, lazy loading, and minification, making it a core tool in modern web development workflows.