Build Settings

In Unity, choose File | Build Settings from the top menu, and take a look at the options you have. You should see the various options mentioned previously.

In the Build Settings window, each platform gives additional options in the form of checkboxes to the right when selecting it on the left. Whilst you can export a build of your project by selecting (highlighting in blue) your desired target and choosing Build, in order for Unity to be best setup for your intended platform, you should select it and then click the Switch Platform button in the bottom left of the Build Settings.

This effectively sets up Unity to work best for your intended target platform. This is especially important when working with mobile development, as Unity will reinterpret the assets you are working with to suit the chosen mobile platform, automatically choosing compression settings in the Inspector for assets already in your project.

The other key advantage of selecting your platform is that it causes...