Laravel Mix is a powerful Webpack wrapper that allows you to manage your app's styles and scripts. You can use Laravel Mix in your Laravel project as well as setting it up in other environments. I've also been using Laravel Mix in Wordpress projects (and it's great!) . The Laravel Mix API is very easy and intuitive and will save you a lot of Webpack configuration time.

Just published a short guide to Laravel Mix here:
https://yossiabramov.com/blog/a-short-guide-to-laravel-mix