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What is Target CPA (tCPA)?

Paying for results, not just clicks.

Target CPA is an automated bidding strategy where you set a specific target for how much you are willing to pay for a sale or lead.

Think of Manual CPC as paying a salesperson an hourly wage (you pay them whether they make a sale or not). Think of Target CPA as paying a salesperson a commission. You tell Google: "Bring me sales and try to keep the cost around $50 for each."

How It Works (The Averaging Logic)

Why some leads cost more than others

If you set your Target CPA to $50, this does not mean every single conversion will cost exactly $50. 

Google's AI looks for cheap conversions and expensive conversions to balance the math.

The Necessity of the "Learning Period"

Do not enable this too early.

Target CPA sounds great, but you cannot use it on a brand-new account. Why? The AI needs historical data. It first needs to know how a "customer" behaves so it can find more of them. 

Rule of Thumb: You should have at least 30 conversions (sales/leads) in the last 30 days before switching to the Target CPA strategy.

If you enable this strategy with zero data, the AI will be guessing blindly. Because Google won't know who to bid for, your costs will likely skyrocket or your traffic will completely stop.

Fraud Risk: "Fake" Acquisitions

When AI Optimizes for Spam

Target CPA has a weakness: It loves "easy" conversions. If a bot farm fills out your contact form 10 times, Google's AI thinks: "Wow! I found 10 leads very cheaply! I will find more of this traffic!"

The Cycle of Waste:

Bots fill out your forms (Spam leads).

Target CPA thinks these are real customers.

Target CPA bids higher on bot traffic because it converts easily.

You pay for spam.

The Fix: Connect ClickSambo to block the bots. When you block fake traffic, you force Google's AI to work harder to find real humans, improving the quality of your leads.