Build Settings: "The Build Settings window contains all the settings and options you need to publish your build to a variety of platforms. From this window you can create a Development Build to test your application, as well as publishing a final build. To adjust the publishing settings for your application’s build go to File > Build Settings."
How to BUILD / EXPORT your Game in Unity (Windows | Mac | WebGL): https://www.youtube.com/watch?v=7nxKAtxGSn8