Anime.js is a lightweight JavaScript library designed for creating animations in web applications. It allows developers to animate CSS properties, SVG, DOM attributes, and JavaScript objects with ease. The library provides a simple API, making it accessible for both beginners and experienced developers. With Anime.js, users can create complex animations using keyframes, easing functions, and timelines. It supports various animation types, including sequential and parallel animations, enabling developers to bring their web projects to life with smooth transitions and engaging visual effects.