Online shopping means buying a product or service through a web site. A web sites name Amazon.com and Buy.com.By this Web sites consumer can buy all shorts of things. Use online, we can buy almost everything like- electronics to jewelry, cloths to books, and cars to appliance and so on. For this we have to subscribe our favorite newspaper or magazine online, hunt for antiques and order complete holiday meals for delivery on our doors. We also buy and sell items of all kinds on auction sites. There are thousands of consumer web sites and each has its own look, feel, and approach to customer satisfaction.

Online shopping would be very difficult if merchants did not provide easy- to-use catalogs on their Web sites. In the early day to e-commerce, many retailers struggled to come up with catalogs that were user friendly for customer and easy to manage.