There are a lot of different companies selling their products online but there is one which is the biggest one in the world. The online shop is called (as everybody knows) Amazon. They offer millions of products and they also sell products from other companies. So when you have a company and want to sell products you can do it at Amazon.com. Everytime you sell a product you have to pay a fee to them.
They also offer great coupons that you can use online.