Migration relates to moving from one version of Webpack to another. This usually involves upgrading to the latest version. It's something that, as a web developer, you may already know is tricky when dealing with other software in general, so this section will be an important one that perhaps you can refer back to when going through future development.

For the sake of providing a more detailed guide, a migration strategy for moving from Webpack 3.0 to Webpack 4.0 is included, so let's go through this now, before moving on to version 5.