Target CPA (Cost per Acquisition) is a Smart Bidding strategy in Google Ads that aims to generate conversions at an average cost you set.
Instead of maximizing volume, Google’s algorithm adjusts bids in real time to keep the cost per conversion around your chosen target CPA.
How Target CPA works
Google Ads uses machine learning to predict which auctions are more likely to result in a conversion. Bids are increased for high-probability users and lowered for lower-probability ones.
The system may bid higher or lower than your target CPA on individual conversions, but over time it aims to achieve the target on average.
When to use Target CPA
Target CPA works best when:
- You have a clear acceptable cost per conversion
- Conversion tracking is accurate
- There is sufficient conversion volume
- Performance stability is more important than volume growth
It is commonly used for lead generation and service-based campaigns.
Target CPA vs Maximize Conversions
Target CPA focuses on cost control, while Maximize Conversions focuses on volume.
Target CPA can limit growth if the target is set too low.
Things to keep in mind
- Setting a target too aggressively can reduce volume
- Learning periods are normal after changes
- Budget constraints still affect performance
- Works best with strong conversion signals
In short
Target CPA helps control acquisition costs by letting Google automatically optimize bids toward a defined cost per conversion.