@babel/plugin-transform-modules-amd transforms ECMAScript modules (ESM) syntax into Asynchronous Module Definition (AMD) format. This Babel plugin enables the execution of modern JavaScript modules in environments that natively support AMD, such as older browsers or systems relying on module loaders like RequireJS. By converting import and export statements into AMD define calls, it facilitates compatibility and seamless integration with existing AMD-based codebases. It's a crucial tool for bridging the gap between modern ESM and legacy AMD environments during project migrations or when maintaining compatibility.