In context
You test 8 PDA angles in 4 ad sets (2 angles per set), each at $25/day ABO. After 5 days, you have $125 of clean data per angle — enough signal to know which 3 angles scale. Switch those 3 to CBO at $200/day and archive the losers.
Why it matters
- ABO guarantees each angle gets a minimum spend floor.
- ABO is slower to scale but cleaner to diagnose.
- Most senior buyers use ABO for testing, CBO for scaling.
Related terms
Frequently asked questions
Is ABO dead?
No — still the best choice for disciplined creative testing. CBO dominates scaling, ABO dominates testing.
How much per ABO ad set?
Minimum $15-20/day per ad set; less and you can't exit learning phase.
Can I run ABO inside Advantage+?
No — Advantage+ campaigns are CBO by design.