E-commerce involves conducting business transactions electronically over the internet. It originated from traditional commerce through families trading goods. E-commerce is suitable for industries like books, software, and travel services that can be delivered online. It allows for 24/7 shopping convenience, increased profits through disintermediation, and a global customer base. However, e-commerce is not suitable for all businesses like perishable goods and industries requiring physical inspection. While it provides benefits like cost savings and accessibility, it also faces challenges like rapid technology changes, security concerns, and limited access for some groups.