How to create AdMob Banner and Get banner_ad_unit_id from AdMob (iOS App)?

Here I will show how to configure iOS application for Admob. To get the Ad unit ID from AdMob you need only a few simple steps:

1.) Log in or sign up https://apps.admob.com

2.) Click -> Apps

3.) Here I chose option (2), because my application was not published in the Apple Store

4.) Enter "App Name", Select iOS (radio button) and Click -> Add

5.) Click -> CREATE AD UNIT

6.) Select -> Banner

7.) Enter "Ad unit name" and Click -> CREATE AD UNIT

8.) Copy "Ad unit id" and Click -> DONE

9.) Paste you "Ad unit id" to file "TabBarController.swift" (see screenshot)