Cut CAC and CPA Automatically with Tapper’s Shadow Campaigns and Validation Rules

Reducing customer acquisition cost (CAC) and cost per acquisition (CPA) starts with eliminating wasted clicks. Tapper helps you do exactly that, automatically.

Instead of relying only on fraud prevention or manual rule setting, Tapper’s Shadow Campaigns and Validation Rules take optimisation further by managing how users interact with your ads across standard Shopping campaigns.

Smarter Spend Control

Every click affects your CAC and CPA, but not every click brings value. Some users click multiple times without ever converting. Tapper detects this behaviour in real time and routes those repeat or low-intent users to a shadow campaign with a lower CPC.

You keep visibility and traffic, but spend far less on users unlikely to convert. That means lower CAC, better CPA, and more budget for high-margin products that actually deliver profit.

How It Works

Tapper runs behavioural analysis across your campaigns:

• When a user clicks several times without converting, Tapper recognises the pattern.
  It automatically redirects that user to a duplicate shadow campaign with lower CPC bids.
• You pay less for those clicks while your main campaign stays focused on genuine, high-intent buyers.

This process improves efficiency on both sides, cutting wasted spend while lowering CPA through cleaner conversion data.

No manual setup, no complex rules, Tapper manages the optimisation in the background.

Why It Matters

By filtering out low-quality or repetitive clicks, Tapper allows your Shopping campaigns to:

• Reduce wasted spend and lower CAC
• Improve CPA by targeting higher-converting users
• Maintain reach on the search results page
• Reinvest budget toward products with stronger profit margins

You can read our full article for a deeper look at how Shadow Campaigns help reduce CAC and CPA, and download the infographic to see exactly how it works in action.