Meta ads term
What is CBO vs ABO?
Campaign Budget Optimization vs Ad Set Budget Optimization — where the budget lives.
CBO (Campaign Budget Optimization, now Advantage campaign budget) sets one budget at the campaign level and lets Meta distribute it across ad sets. ABO (Ad Set Budget Optimization) sets a fixed budget per ad set, giving you tighter control over how much each audience or test cell spends.
ABO is common for clean creative testing because each cell gets guaranteed spend; CBO is common for scaling once winners are clear. Either way, you can bulk-launch into both.
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