What do you mean by E Commerce? How is it useful for us?

According to me E commerce is the marketplace where business person as well as non business person can do their business and sales which is online marketing and online sale to grow the business with less investment. And E commerce business is growing too fast in India because now max people are using internet for the any kinds of transactions like product & services buing, Making payment and transfer amount to others. E commerce is huge opportunity for interested people.