> Quick answer: Open Ads Manager, edit your campaign, and toggle Budget Optimization on. All ad sets must share the same bid strategy, budget type, and standard delivery. Give Meta at least 7 days before drawing conclusions.
What's the Difference Between ABO and CBO?
ABO (Ad Set Budget Optimization) puts you in manual control. You set a separate budget for each ad set individually.
CBO (Campaign Budget Optimization), now called Advantage+ campaign budget by Meta, works at a higher level. You set one budget for the whole campaign. Meta's algorithm distributes it across ad sets in real time, constantly chasing the lowest cost per result.
Why Switch from ABO to CBO?
Lower costs and improved efficiency
Meta's data shows Advantage+ campaign budget can decrease cost per action by an average of 4.6%. The algorithm catches performance shifts faster than manual budget adjustments ever can.
Automatic budget allocation to top performers
With ABO, your best-performing ad set hits its individual budget ceiling and stops scaling. With CBO, Meta pushes more spend toward the winner automatically.
Less manual management needed
One campaign budget to monitor. One number to adjust. That is the core trade-off you get with CBO.
Eligibility Requirements for CBO
Per Meta's Business Help Center, three conditions must be met before you can make the switch.
Same bid strategy across all ad sets
Every ad set in the campaign must use the same bid strategy. Mixing lowest cost and cost cap within one campaign blocks the switch entirely.
Same budget type (daily or lifetime)
All ad sets must share one budget type. Daily and lifetime budgets cannot coexist inside a single CBO campaign.
Standard delivery type (not accelerated)
Accelerated delivery is not compatible with CBO. Switch any accelerated ad sets to standard delivery before you proceed.
Step-by-Step: How to Switch to CBO
Step 1: Decide which ad sets to consolidate
Pick ad sets with proven performance data. ABO is a solid testing ground. Move the winners into CBO once you know what works.
Step 2: Ensure all ad sets meet eligibility requirements
Check bid strategy, budget type, and delivery type across every ad set. Fix any mismatches now. The switch will fail if conditions are not met.
Step 3: Change your budget to campaign level in Ads Manager
Go to Ads Manager. Hover over your campaign. Click Edit. Find the Budget Optimization toggle and switch it on.
Step 4: Set your campaign budget
Enter your total campaign budget at the campaign level. Meta applies the change in about 15 minutes. Daily budgets aim to hit your target on average over a full week, with possible overages up to 25% on high-opportunity days.
Step 5: Monitor performance at the campaign level
Stop tracking individual ad set spend in isolation. Per Meta's documentation on understanding Advantage+ campaign budget results, focus on total optimization events and average cost per optimization event at the campaign level.
How to Maintain Control with Ad Set Spend Limits
Switching to CBO does not mean losing all control. Meta lets you set spend limits per ad set.
Setting minimum spend limits
A minimum spend limit signals to Meta that it should allocate at least a certain amount to a specific ad set. Use this to protect a new audience while the algorithm is still learning.
Setting maximum spend limits
A maximum spend limit caps how much budget flows to one ad set. Use this to prevent a weaker ad set from absorbing a disproportionate share of the campaign budget.
What to Expect When You Switch
Initial learning phase
Meta needs roughly 50 optimization events per ad set per week to exit the learning phase. Expect some instability in results for the first few days. This is normal.
Budget reallocation across ad sets
Some ad sets will receive more spend. Some will receive less. That is the system working as designed, not a problem to fix.
Changes in reporting perspective
Campaign-level metrics now matter more than ad set metrics. Per Meta's guidance, measure campaign-level cost per event rather than individual ad set performance in isolation. Comparing ad sets against each other is less useful in a CBO structure.
Best Practices for CBO Success
Test with ABO first before switching
Validate your creatives and audiences with ABO. Move proven winners into CBO campaigns. Switching without performance data wastes learning-phase budget.
Allow sufficient learning time (at least 7 days)
Give Meta at least a week before drawing conclusions. Turning off a CBO campaign early locks in learning-phase data, not stable performance signals.
Use Coinis Campaign Launcher to set up optimized campaigns
Coinis Campaign Launcher walks you through campaign setup in one structured flow. Budget type, bid strategy, and delivery settings are all configured together. No eligibility requirements get missed because the flow enforces consistency.
Monitor with Coinis Advertise reporting
After the switch, your reporting lens shifts to campaign level. Coinis Advertise gives you real-time performance data across campaigns in one dashboard. Track cost per event without jumping between Ads Manager tabs.
Or let Coinis do it.
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Frequently Asked Questions
Can I switch back from CBO to ABO after making the change?
Yes. You can turn off Advantage+ campaign budget in Meta Ads Manager at any time and return to individual ad set budgets. Keep in mind the algorithm will need to re-learn once you make changes to the budget structure.
How long does it take for CBO to start working after I switch?
Meta applies the budget change in about 15 minutes. However, the algorithm needs roughly 50 optimization events per ad set per week to fully exit the learning phase, which typically takes at least 7 days. Avoid making major changes during this window.
Does CBO work for Instagram-only campaigns?
Yes. Advantage+ campaign budget is available for campaigns running on Instagram, Facebook, or both. The eligibility requirements (same bid strategy, same budget type, standard delivery) apply regardless of which placements you use.