Sorry for the delay.
Just add the mobile advert plugin, srt the appid, publisherid AND add a privacy URL
Example to show banner if no banner is already shown:
+ System: On start of layout
+ MobileAdvert: [X] is showing banner
-> MobileAdvert: Create banner advert "ADVERTID HERE" size: Smart portrait show: true
the [X] means Inverted, so if banner is NOT showing.