E-commerce involves buying and selling of goods and services over electronic systems like the internet. It allows for global access to markets 24/7 with lower costs than traditional brick-and-mortar stores. The process involves a consumer browsing a merchant's website, adding items to a cart, paying for the order online typically with a credit card, and receiving a confirmation receipt while the order is fulfilled. While e-commerce provides convenience and choice, it also carries risks like inability to physically examine products and potential credit card theft.