In this world, there are a lot of trades which are done by people. There are some trades which are done by people in the trading market all over the world. In this case, the trade can be seen by naked eye, or in real form. But, on the other hand, there are also many trades which are done by people in the internet. Sometimes the trades are called as online trading. Usually, the people, who do the trade in the internet by online, are the people or persons who want to sell or buy the products of a business to or from the other people or the customers in the worldwide. Beside it, the people, who sell or buy the products from the internet by online, are also the person who has the money, and in a long distance. At the first time in joining the online trade, we will be given the discount promo codes by the seller. That was a way to interest us to buy the products in online trade. This discount promo code is usually given by the sellers when they have launched a new product of their business. Meanwhile, if the people have already taken a part in the online trade for a long time, they will be given a discount code by the sellers. It was a sign that the people or the old customers are the loyal customers. The discount codes can be used easily in shopping online and in order to get the discounts for each item that we want to buy. Of course, the discount codes are very useful for the customers in online trade. Besides the discount codes, the sellers in the online shopping also give their customers a coupon code. Coupon codes are usually used for the particular item and sometimes coupon codes are used as the codes to give a reward for the customers.