This was introduced a few years ago in the Swiss retailer chain Migros. The span between the sell-by date and the use-by date (typically around 1/10-1/5 of the

This was introduced a few years ago in the Swiss retailer chain Migros. The span between the sell-by date and the use-by date (typically around 1/10-1/5 of the entire lifespan of the product) would give the consumer the safety that the product was usable for a few days without checking the dates. Without it, you need to check the date of every perishable product you buy if you want to consume it even the next day. If the store forgot to remove the product for a day (which happens regularly), you would buy a potentially harmful product if you don't always check the date. On the positive side, the food can be sold regularly just until its expiry date, preventing food waste.