One of the best things about promotional codes is that anyone can deal with them on a variety of sites that issue these codes. They are completely legal to use on sites that can accept them. After all, these voucher codes are ones that will have been marketed by a website that wants people to use them. Websites will want people to learn about these discount codes so that the websites can get more business. This can be used to get people to learn about sites and to find out things that relate to what one can buy off of a site.