Does any 1 know how to pause Audience Network Ads inside the onpause method?

Guys I am using fb ads and I realized that the rates I am getting have gone down because I am loading too many ads but displaying only a few

I want to know if any 1 is using audience network and how they are handling pausing ads inside the onPAuse method of the Activity

please help

I never worked particularly on audience network callbacks…I think we cannot stop ads on pause…