Creating multiple campaigns is limited for Google AdWords services.
See the following.
| Name | OS | Limitation |
| AdMob / GDN | Android | 1 campaign only |
| iOS | 1 campaign only | |
| Search / Listing | Android | 1 campaign only |
| iOS | - (Multiple campaigns available) | |
| Youtube / TrueView | Android | 1 campaign only |
| iOS | 1 campaign only |