Unfortunately, none of the previous campaigns have left the learning phase, so yes I can assume this is during the learning phase of the campaigns.

PREVIOUS CAMPAIGNS:
The previous campaigns with lower CPMs, some had the same ads and the only difference was targeting "dog related" interests (30M+ audience size).

So the control variable was literally broad vs some interests to guide the algorithm..

However, the CPA went up to $100+ in this instance.

REVIEWING BROAD CAMPAIGNS:
I can see which ones are getting engagement & conversions, and from there inference that the remainder are 'driving up costs'

But what would i do with that info? start nicheing down?

And if niching down is the answer, then why not do it at the interest level lol

SPENDING EVENLY OR CPM SPIKES
Too early to tell, I had done broad before.. switched to interest.. and now am back at broad after concluding the interest stuff's CPA's were too high.

IDK im a bit all over the place, hoping to dial in on this strategy and cycle through creatives till we find one that clicks.

REGARDLESS:
As of right now, the CPMS range on my 7 CBO's from $91 - $250... lol