> Quick answer: Go to Meta Ads Manager, create a campaign, choose your objective, then toggle Advantage+ Campaign Budget on. Set a daily or lifetime budget, pick a bid strategy, configure your ad sets, and publish.
What is Campaign Budget Optimization (CBO)?
Definition and how it differs from ABO
Meta now calls this feature Advantage+ Campaign Budget. The old name was Campaign Budget Optimization. Same feature, updated branding.
With CBO, you set one budget at the campaign level. Meta's AI distributes that budget across your ad sets in real time. It identifies the best opportunities and shifts money there automatically.
With ABO (Ad Set Budget Optimization), you assign a fixed budget to each ad set manually. CBO removes that manual work and lets the algorithm decide.
When CBO is the right choice
CBO works best when your ad sets target similar audiences and share the same goal. If your ad sets are very different, the algorithm may favor one and starve the rest. Use CBO when you want to scale without manually monitoring every ad set budget.
Step-by-Step: How to Set Up Campaign Budget Optimization
Per Meta's Business Help Center, here is the exact setup flow in Ads Manager.
Step 1: Create a new campaign in Ads Manager
Open Meta Ads Manager. Click the green Create button. Name your campaign.
Step 2: Choose your campaign objective
Select the objective that matches your goal. Sales, leads, traffic, or awareness. Your objective tells Meta how to optimize delivery.
Step 3: Enable Campaign Budget Optimization toggle
Scroll down on the campaign setup screen. Find the Campaign Budget Optimization toggle. Switch it on. Meta may label it Advantage+ Campaign Budget.
Step 4: Set your budget type and amount
Choose daily budget or lifetime budget. All ad sets in this campaign must use the same budget type. Enter your total amount.
Step 5: Configure bid strategy and audience
Select a bid strategy at the campaign level. Lowest cost is the default for most objectives. Then build your ad sets, each with its own audience, placements, and creative.
Step 6: Review and launch
Check the campaign summary. Confirm that all ad sets share the same budget type and bid strategy. Click Publish.
Key Requirements for CBO Setup
Budget type consistency
All ad sets must use the same budget type. You cannot mix daily and lifetime budgets inside one CBO campaign.
Bid strategy alignment
One bid strategy applies across the entire campaign. Choose lowest cost, cost cap, or bid cap. All ad sets follow that same rule.
Delivery type requirements
CBO requires standard delivery. Accelerated delivery is not compatible with this feature.
CBO Best Practices
Use larger audiences for better optimization
Broader audiences give the algorithm more data. More data means faster learning and better budget allocation.
Avoid excessive ad sets (70+ limit)
Keep campaigns under 70 ad sets. Per Meta's best practices documentation, exceeding 70 ad sets limits post-launch edits and slows the learning phase. The optimal range is 1 to 6 ad sets.
Manage pausing and unpausing strategically
Pausing and unpausing ad sets disrupts the learning phase. The algorithm loses signal and may shift budget inefficiently. Once a campaign is live, change as little as possible.
Consider ad set spend limits
Minimum and maximum spend limits per ad set are useful when a specific audience matters and needs protection from budget starvation. Overuse of limits reduces the flexibility that makes CBO valuable.
Make bulk changes
Budget and targeting updates take about 15 minutes to apply. Group your edits and make them all at once. Repeated small changes reset learning unnecessarily.
CBO Performance and Optimization
Tracking results at campaign level
Focus on campaign-level totals, not individual ad set spend. Track total optimization events and average cost per event. One ad set taking 80% of the budget is normal if it is performing best.
Understanding budget distribution
CBO does not split budget evenly. The algorithm moves money toward whatever is working. That is the point.
Common CBO mistakes to avoid
Three common errors. First, grouping very different audiences in the same CBO campaign. Second, pausing and unpausing ad sets repeatedly during the learning phase. Third, judging campaign health by how much each ad set spends instead of total campaign results.
Meta reports that Advantage+ Campaign Budget decreases CPA by an average of 4.6% compared to manual budget allocation. Results vary based on your creative, audience, and offer.
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Frequently Asked Questions
What is the difference between CBO and ABO on Facebook?
CBO (Campaign Budget Optimization, now called Advantage+ Campaign Budget) sets one budget at the campaign level and lets Meta's AI distribute it across ad sets automatically. ABO (Ad Set Budget Optimization) gives you manual control over how much each individual ad set spends.
How many ad sets work best with CBO?
Meta recommends keeping ad sets between 1 and 6 for optimal performance. Campaigns with more than 70 ad sets limit post-launch edits and slow down the algorithm's learning phase.
Can I change my CBO budget after the campaign goes live?
Yes. Budget and targeting changes take about 15 minutes to apply. Make all edits in bulk rather than one by one to avoid repeatedly resetting the learning phase.