Vue.js is a popular JavaScript framework for building user interfaces, known for its declarative rendering and reactivity features. It has gained popularity due to its ease of learning, performance, lightweight nature, and flexibility, making it suitable for various projects such as Single-Page Applications, Web Components, and desktop applications. However, Vue also has some drawbacks, including less community support compared to other frameworks like Angular and React, fewer third-party libraries, and limited job opportunities. Despite these limitations, Vue has a wide range of resources available for learning and creating with it.