It's valuable to learn AngularJS because it's a widely used technology language for application development in the technology market. Using AngularJS can help web app developers write cleaner and more efficient code, as it uses JavaScript framework to extend HTML into a more expressive and readable format. It allows web app developers to decorate HTML with special markup that synchronizes with JavaScript code. Angular JS is known for its robustness, browser support, and independence from platforms. While at the same time, it is backed by Google, which certainly helps it to maintain the support and evolution of the app framework. Most major browsers support AngularJS.