Summary
We had two campaigns that were limited by demand, meaning it was difficult for them to learn and provide a stable, predictable outcome. We merged them under common budgets and applied a portfolio bid strategy. As a result, with a target of $110 per conversion, we achieved an average of (105+115)/2 = $110, which matches our exact target. Thus, we maintained the granularity of the campaigns and gained the ability for more flexible management, while enriching the campaigns with the data they lacked for algorithmic stability.
