In merchandising, the visibility threshold refers to the minimum display area required for a moving customer in a store to notice it. Generally, this threshold is estimated to be around 20 centimeters in small shops and around 35 centimeters in large supermarkets. This difference is due to the fact that customers typically move more slowly in smaller shops. Furthermore, the visibility threshold can vary depending on the product’s location within the store, as customer movement speeds are not uniform. Therefore, the visibility threshold must be adjusted to reflect actual consumer behavior in stores.