The Lie Google Tells About Shopping Performance

Google wants you to believe your Shopping campaigns are performing well. The metrics they highlight are designed to make you feel good and keep spending.

But there's a fundamental lie buried in how performance is presented.

The ROAS Illusion

Google's default reporting shows you Return on Ad Spend. On the surface, this looks like the perfect metric. Spend £1, get £4 back. That's a 400% ROAS. Success, right?

Not necessarily.

ROAS measures revenue, not profit. If your average margin is 25%, that 400% ROAS might barely be breaking even after costs. At 15% margin, you could be losing money on every sale.

The Conversion Value Problem

Google Smart Bidding optimises for conversion value. It's trying to maximise revenue.

But here's what it doesn't know:

• Your actual product margins
• Your fulfilment costs per item
• Your return rates by product
• Which customers become repeat buyers

Without this context, Google Shopping campaigns optimise for the wrong outcome. You get more revenue, but not necessarily more profit.

The "Good Performance" Trap

Google will celebrate your campaigns when:

• Impressions are up
• Clicks are growing
• Conversions are increasing
• ROAS is "above target"

None of these guarantee you're making money. They just mean Google is spending your budget effectively on their terms.

What Actually Matters

Profit-focused Google Shopping management requires different metrics:

• Profit per click - Not just cost per click
• POAS (Profit on Ad Spend) - Not just ROAS
• Margin-weighted conversions - Not all sales are equal
• SKU-level profitability - Where is the real money?

These metrics tell you what's actually happening in your business, not what Google wants you to see.

The Smart Bidding Blindspot

Smart Bidding is genuinely clever technology. But it's optimising for a goal that might not match yours.

When you set a target ROAS, Google finds ways to hit it. That might mean:

• Pushing low-margin, high-volume products
• Avoiding high-margin products with lower conversion rates
• Prioritising new customer acquisition over profitability

The algorithm hits your target while missing your goal.

How to See Through the Lie

Start measuring what matters:

1. Connect margin data to your Shopping campaigns
2. Assign commercial roles to every SKU
3. Report on profit, not just revenue
4. Audit regularly with business context, not just platform metrics

Google will never tell you this. Their business model depends on you spending more. Your business model depends on you spending smarter.

Want to see what your Shopping campaigns are really doing? Book a free audit that focuses on profit, not the metrics Google wants you to celebrate.