Duty free allows you to buy detaxed products, which means you save on VAT between 15 and 20% off the normal price.
You will have access to the « Duty Free » shops, offering detaxed prices only if you are travelling to a TOM (Overseas Territory) or to a country outside the EU.
( Before buying Duty free goods, it is adviseable to check the customs reglementation in your country of destination. Indeed, the quantity of products may be limited on your arrival. You risk a fine or confiscation of your purchases depending on the quantity.