How do I add Vuforia SDK with Unity?

The Vuforia Engine package can be added to a Unity project from a Git URL.

Import the utility script into your Unity project and it will make the necessary changes to your project: SDK Download | Vuforia Developer Portal

and then follow the steps using this link:

https://library.vuforia.com/articles/Solution/vuforia-engine-package-hosting-for-unity.html