Social network sites such as Facebook and Twitter have become increasingly popular for sell-side e-commerce and would normally be considered to be in which category?

What is ecommerce? Ecommerce is a method of buying and selling goods and services online.   E-commerce businesses may also employ some or all of the following: Online shopping for retail sales direct to consumers via web sites and mobile apps, conversational commerce via live chat, chatbots, and voice assistants. Providing or participating in online marketplaces, which process third-party business-to-consumer (B2C) or consumer-to-consumer (C2C) sales; Business-to-business (B2B) buying and selling. Gathering and using demographic data through web contacts and social media. B2B... Show more

What is ecommerce? Ecommerce is a method of buying and selling goods and services online.

 

E-commerce businesses may also employ some or all of the following:

Online shopping for retail sales direct to consumers via web sites and mobile apps, conversational commerce via live chat, chatbots, and voice assistants.
Providing or participating in online marketplaces, which process third-party business-to-consumer (B2C) or consumer-to-consumer (C2C) sales;
Business-to-business (B2B) buying and selling.
Gathering and using demographic data through web contacts and social media.
B2B electronic data interchange.
Marketing to prospective and established customers by e-mail or fax (for example, with newsletters).
Engaging in pretail for launching new products and services.
Online financial exchanges for currency exchanges or trading purposes.

There are five essential categories of E-commerce:

Business to Business
Business to Consumer
Business to Government
Consumer to Business
Consumer to Consumer
 

(Source: Wikipedia)

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