Oh definitely, if you have the option to optimize for conversions, you should definitely try it. From memory that was a key factor in patio11 finding success w

Oh definitely, if you have the option to optimize for conversions, you should definitely try it. From memory that was a key factor in patio11 finding success with Bingo Card Creator. That said, if your conversion rate is the typical "1% of trial users buy / x% of visitors download", it can take a long time to optimize. And if you try to use trial signups / downloads as a proxy conversion for sales, you can end up optimizing for the wrong thing (eg optimizing for freeloaders / kick the tyres, not buyers). Curious to hear if Aha!'s mobile app exclusion method actually works - I tried a similar exclusion and it didn't work for me, I still play mobile app whack-a-mole. Google called me when I stopped my ads & told me that entering a -300% bid for mobile was a hack from engineering that would stop showing all ads on tablets, but the interface wouldn't accept anything more than -100% (which I already had).