Today, online sales are viewed as a phenomenon are popular all over the world due to the thriving information technology. It also has advantages and disadvantages in sales for merchants as follows: save the unnecessary expenses such as hiring of premises to sell and promote products quickly wide to ARA hàng.ngo guests out It helps customers to save time, to easily compare the prices in the market, but also the risk of the customer, it is easy to change the opinion of his purchases lead to exhausted travel expenses, loss of time. so to get the trust of customers is difficult.
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