There are three ways to set up a Chromebook VPN. The first and easiest method is to use a Chrome extension if your provider offers one. Install it, toggle the service on, and you’re good to go.
The second option is to use an Android app, but this only works on Chromebooks with access to the Play Store. Download the app to your Chromebook, set things up like you would on your smartphone, and you’re done. Not all VPN apps run perfectly on Chrome OS, so you might encounter a problem or two depending on your provider.