Vue.js is a JavaScript framework for developing software interfaces using the MVVM (Model-View-ViewModel) architecture pattern. Vue is suitable for small projects that need to add some reactivity, display values on user input, authorization form or other similar tasks. Vuejs scales easily and is well suited for high-volume projects, hence it is called a progressive framework. Vue is also well suited for large single-page applications due to its core components such as Router and Vuex. However, Vue is best suited for developing solutions that use external APIs to process data. The main advantages of Vue.js include flexibility, light weight, ease to use, accessibility and popularity.