How to start an Online business?
If your business is selling non-virtual (physical) products like books or CDs, your ecommerce solution package will require the use of an order fulfillment service to handle the inventory control, customer service, and shipping of your products after sale. Many ecommerce solutions providers already offer this service to users. They make everything simple to administer from a personal web interface. Shop around for them.

If you decide not to use one of these third party ecommerce solutions providers, your business will need to acquire and implement all of the following: Merchant Account A merchant account is a specialized business bank account which allows you to accept credit card payments.

SSL Web Hosting You need a reliable web host with SSL server capability to accept credit cards and send payment information securely. Most hosts provide this for a reasonably low monthly or yearly fee.
 
Shopping Cart Software If you are selling more than a few products, use a shopping cart program or other ecommerce software to keep track of items and prices, calculate all included costs, and integrate with online payment processing gateway for credit card verification.

Credit Card Processing Gateway In order to process a credit card to transfer payment from your customer's bank account to your own.