E-commerce, or electronic commerce, refers to the process of conducting commercial activities through electronic communication technologies such as the Internet and mobile Internet. E-commerce digitizes and onlineizes the transaction, payment, logistics and other links in the traditional business model, connects buyers and sellers, and realizes the exchange and transaction of goods or services.

The overview of e-commerce can be described from the following aspects:

1. Online shopping platform: E-commerce platforms such as Amazon, JD.com, Alibaba, etc. provide a virtual shopping place that centrally displays goods and services. Consumers can choose goods, place orders, pay, and choose delivery methods on these platforms.

2. Online payment: E-commerce enables consumers to make payment transactions conveniently and safely by providing various payment methods (such as Alipay, WeChat payment, credit card payment, etc.).

3. Logistics and distribution: E-commerce platforms provide consumers with product distribution services by cooperating with logistics companies. Logistics companies are responsible for shipping goods from sellers' warehouses or manufacturers and delivering them to buyers.

4. E-commerce ecosystem: E-commerce is not limited to online shopping platforms. It also includes e-commerce service providers, e-commerce marketing, online advertising, customer relationship management, supply chain management and other links, forming a complete e-commerce ecosystem.

5. Innovative model: E-commerce has also spawned some emerging business models, such as C2C (consumer to consumer) trading platforms, sharing economy platforms, subscription services, etc.

E-commerce has flourished in recent years, bringing consumers convenient and diverse shopping experiences and creating new business opportunities for companies. Through e-commerce, consumers can shop anytime and anywhere, while companies can also expand their markets, reduce marketing costs, and provide more diverse products and services.