| ABO | CBO | |
|---|---|---|
| Full form | Ad Set Budget Optimization | Campaign Budget Optimization |
| Budget controlled at | Ad set level | Campaign level |
| Who decides spending? | You decide how much each ad set gets | Meta distributes budget between ad sets |
| Control | ⭐⭐⭐⭐⭐ High | ⭐⭐⭐ Medium |
| Optimization | Manual | More automated |
| Best for | Testing audiences | Scaling winning audiences |
🔹 ABO Example
You have 3 audiences:
- Ad Set 1: 18–24 → ₹500/day
- Ad Set 2: 25–34 → ₹500/day
- Ad Set 3: 35–44 → ₹500/day
Each ad set gets its own fixed budget.
🔹 CBO Example
You set:
Campaign budget = ₹1,500/day
Meta may automatically spend:
- Ad Set 1 → ₹800
- Ad Set 2 → ₹500
- Ad Set 3 → ₹200
It allocates more money toward the ad sets it believes can generate better results.
🚀 Which should you use?
For testing → ABO
You want to compare audiences fairly and control spending.
For scaling → CBO
You have winning audiences/ads and want Meta to optimize budget automatically.
Simple rule:
ABO = More control
CBO = More automation & optimization