Client setting
Clients having test=true will get the test Ads, not having test=true will get the production Ads. The normal mode.
Force off
All clients get the production Ads no matter their setting (monetization needs to be enabled). Used when test=true has been left on in the clients accidentally.
Force all
All clients get the test Ads no matter their setting. Monetization does not need to be enabled in order to get test Ads for all clients. DO NOT use this for any live apps.
Test devices only
Only clients listed as test devices get the test Ads. All other devices get production Ads if monetization is enabled. This can be used for testing new revisions of live games with test Ads. The devices are identified by their plain text advertising IDs. See {ifa} in this document