For B2B Facebook interactive ads, should the budget be set at the campaign level (CBO) or ad set level (ABO)? Key considerations for foreign trade professionals: Choosing the right hierarchy is more important than saving money. Evaluate the pros and cons of both approaches and their applicable scenarios based on actual performance.

Campaign Budget Optimization (CBO): Meta's system allocates the total budget intelligently to high-performing ad sets. Advantages include time and effort savings, maximizing overall interaction effectiveness, avoiding budget waste, and suitability for B2B scaling phases. Spending limits can be set with upper and lower bounds.

Disadvantages include weaker control over individual ad sets, potential issues where top-performing ad sets dominate the budget, insufficient exposure for test groups, making it unsuitable for creative or audience testing.

Ad Set Budget (ABO): Manual independent budget allocation for each group without interference. Advantages include precise control, accurate budget allocation to key audiences or creatives, reliable test results, and suitability for B2B testing phases to prevent core groups from being starved of budget.

Disadvantages include requiring manual optimization, being time-consuming, potentially lower budget utilization rates, and difficulty for single ad sets with too low budgets to complete system learning.

Conclusion: For B2B testing phases, choose ad set budgets to accurately test creatives and audiences. For mature scaling phases, opt for campaign budgets to save effort and improve efficiency. Select based on your advertising stage to ensure every dollar is well spent.