With the increase in the number of users accessing the internet in the world today, and with the growth of eCommerce, conducting business online is almost a non negotiable matter. Customers would want to purchase their goods and services from the comfort of their homes without physically going to a place where these goods and services are offered. Failing to meet this particular need would put a business at a disadvantage. The benefits that come with the adoption of eCommerce by a business are enormous, making the investment in terms of time and money required to get started well worth the investment. This module introduces the learners to eCommerce in general, including advantages and disadvantages of eCommerce. It looks at the different eCommerce Models on the market. The module also gives highlights on how to place a business on the internet, promotion techniques and tools are also discussed in this module and finally the security concerns and measures to ensure security for online stores are discussed.