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Google Shopping CTR: 7 Fixes for Zero-Click Impressions

Low Google Shopping CTR is the most frustrating scenario in ecommerce: Google shows your product to thousands of shoppers, but not a single person clicks. You have the impressions, but zero traffic — and every day you ignore it, Google slowly stops showing your SKUs at all.

To understand why zero-click impressions are dangerous, you must understand how Google monetizes Shopping. Unlike traditional media where you pay flat fees for views, Google Shopping runs on a Cost-Per-Click (CPC) model. Google only gets paid when a user clicks an ad.

Because of this, Google's algorithm evaluates ads based on their eCPM (effective Cost Per Mille) —the expected revenue Google makes for every 1,000 times your ad is shown. The formula for eCPM is simple:

Consider this scenario: You bid $1.00 on a keyword with a 0.1% CTR . Google's eCPM is: 0.001 × $1.00 × 1,000 = $1.00 expected revenue.

Your competitor bids only $0.20 on the same keyword, but has a highly optimized title resulting in a 2.0% CTR . Google's eCPM is: 0.020 × $0.20 × 1,000 = $4.00 expected revenue.

Even though your bid is 5x higher, Google's algorithm will show your competitor's ad in the primary slot because Google makes 4x more money displaying it. Over time, your ad is pushed down, your impressions drop, and your CPC is raised to compensate for the poor relevance. Low CTR is a terminal diagnostic signal in PMax.