Have you ever noticed that the most expensive items in the supermarket are always right at eye level? This is no coincidence. Retailers use a clever strategy known as the "golden shelf" or "shopper attention zone." Take dairy products, for example. Premium Danone yogurts and Président cheeses are often found on the third shelf. In the coffee section, Lavazza and Julius Meinl occupy central positions, increasing sales by up to 30% thanks to this placement. Research shows that products at eye level sell 30-60% better. Retailers like Perekrestok and Auchan use heat maps and customer behavior data to position their most profitable items precisely there. For children's products, however, the tactic is different: brightly colored LEGO toys or Nestlé Cereal cereal are placed significantly lower, at child's eye level. This directly influences 85% of family purchases, stimulating children's requests. This psychological trick, based on the primacy and convenience effect, makes us spend more. Next time you see an iPhone or Lay's chips at the perfect height, remember: your brain has already fallen for this marketing ploy.