E commerce which is also known as Electronic commerce or internet commerce that provides the facilities for buying and selling of good, products or services over the internet. These services provided online over the internet network. Transaction of money, funds and data are also considered as E-commerce. This kind of online business transactions mainly happens in four ways. Which are Business to Business (B2B), Customer to Customer(C2C), Customer to Business(C2B) and Business to Consumer (B2C).

E-commerce, which can be conducted over computers, tablets, or smartphones may be thought of like a digital version of mail-order catalog shopping. Nearly every imaginable product and service is available through e-commerce transactions, including books, music, plane tickets, and financial services such as stock investing and online banking. As such, it is considered a very disruptive technology.

1. Retail

   The sale of a product by a business directly to the customer without any intermediary.

2. Wholesale

   The bulk sales of products, often to a retailer that then sells them directly to consumers.

3. Dropshipping

   The sale of a product, which is manufactured and shipped to the consumer by a third party.

4. Crowdfunding

   The collection of money from consumers in advance of a product being available in order to raise the startup capital necessary to bring it to market.

5. Subscription

   The automatic recurring purchase of a product or service on a regular basis until the subscriber chooses to cancel.

6. Physical products

   Any tangible good that requires inventory to be replenished and orders to be physically shipped to customers as sales are made.

7. Digital products

   Downloadable digital goods, templates, and courses, or media that must be purchased for consumption or licensed for use

8. Services

   A skill or set of skills provided in exchange for compensation. The service provider's time can be purchased for a fee.