babel-plugin-minify-mangle-names significantly reduces code size by aggressively renaming variables and function names in your JavaScript code processed by Babel. This minification plugin employs advanced techniques like property collision to shorten identifiers, leading to smaller bundle sizes. Ideal for production builds where code readability is less important, babel-plugin-minify-mangle-names helps optimize your website's performance through decreased download times. It's a crucial step in preparing your code for deployment.