babel-preset-es2015 is a Babel preset that compiles ECMAScript 2015 (ES6) code into widely compatible JavaScript. It enables developers to use modern JavaScript features like arrow functions, classes, and template literals while ensuring the code runs smoothly in older browsers and environments. This preset is a foundational tool for many JavaScript projects, streamlining the process of adopting new language features and maintaining broad compatibility. While largely superseded by @babel/preset-env, it remains relevant for specific needs.