How a Repeated Homepage Placement Made a Product a Best-Seller — and Hid Its Weaknesses
A real-world example of Mere exposure effect in action
Context
A mid-size e-commerce retailer was experimenting with homepage merchandising to increase overall sales during a seasonal push. The merchandising team had freedom to choose weekly featured products and leaned toward items that had been in the homepage rotation frequently over the prior quarter.
Situation
To drive conversions during a 12-week campaign, the team placed a single mid-priced kitchen gadget in 6 of the top 8 homepage slots and included the same product in weekly marketing emails. The product had average review scores and margins; competing products scored higher on key features but had less prior homepage exposure.
The bias in action
Customers repeatedly exposed to the gadget on the homepage and in emails began to prefer it simply because it felt familiar. Site analytics showed a click-through rate to that product that was 2.3x higher than similarly priced competitors despite similar or inferior feature sets. Internal discussions attributed the uplift to product merit, while procurement and supply teams discounted the role of repeated exposure in shaping customer choice. Merchandisers continued prioritizing the gadget because of its visible short-term success.
Outcome
Over the 12-week campaign the featured gadget became the retailer's top-selling item in its category, generating a notable short-term revenue boost. However, after the campaign ended and rotation resumed, sales for the gadget dropped by 40%, and average customer return rates for the item were 1.8x higher than category average. Competing higher-quality items saw a lasting sales decline — suggesting cannibalization driven by familiarity rather than superior value.
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