Highest volume vs cost cap vs bid cap. Which should I use?

Bid strategy controls how aggressively Meta bids in auctions on your behalf. Each option has a specific use case. Using manual bidding without adequate historical data is the most common cause of campaigns that do not deliver.

This issue is common among Meta advertisers and usually indicates a structural or optimization problem that can be resolved with the right approach. Understanding the mechanism behind the problem is the first step to fixing it.

This problem typically stems from one or more of the following:

• Check conversion history (50+ conversions needed for cost cap)
• If using cost/bid cap, check if campaign is actually delivering
• Verify CPA target is based on historical data, not wishful thinking

Follow these steps to identify the root cause:

1. Check conversion history (50+ conversions needed for cost cap)
2. If using cost/bid cap, check if campaign is actually delivering
3. Verify CPA target is based on historical data, not wishful thinking
4. Use Highest Volume when starting out or during learning phase
5. Switch to Cost Cap only after reliable CPA target is established

Once you've identified the cause, apply these fixes:

1. Start by identifying the root cause using the diagnostic checklist above
2. Make one change at a time and wait 24-48 hours to see results
3. Document what you changed and the outcome for future reference
4. If the issue persists, consider reaching out to Meta support with specific details
5. Use the quick fix page for immediate action items