While search engines index registered sites which users search by inputting key words, which type of intermediary updates its content typically through text but can include video or audio delivered through RSS feeds?

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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