Setting your target platform

New Unity projects normally default to targeting standalone desktop platforms. If this works for you, you do not need to change anything. Let's see:

Open the Build Settings window (File | Build Settings…) and review the Platform list
Choose your target platform. For example:
- If you're building for Oculus Rift or HTC VIVE, for example, choose PC, Mac & Linux Standalone
- If you're building for Windows MR, choose Universal Windows Platform
- If you are building for Google Daydream on Android, choose Android
- If you are building for Google Cardboard on iOS, choose iOS
Then press Switch Platform