1. Provide competitive pricing
2. Purchases provide a responsive, fast, and friendly.
3. Provides information on goods and services that are comprehensive and clear.
4. Provides many bonuses such as coupons, special offers and discounts.
5. Giving special attention such as the proposed purchase.
6. Providing a sense of community for discussion, input from customers, and others.
7. Facilitate trade activities
source : http://id.wikipedia.org/wiki/Bisnis_internet