With this PrestaShop module called "voucher for friends"  you can add great feature to your shop, where your customers can send discount code to their friends. As a shop owner you can define the value of the coupon that friends of your customers will receive. You can define each aspect of the voucher like value (percentage, value in amount, free shipping) and other things related to voucher conditions like condition related to products, categories, manufacturers, carriers etc.

It's great advertising and marketing feature that will gain more cusotmers to your online shop.

homepage banners in PrestaShop