[Definition] Business

Successful business (1) creates or provides something of value that (2) other people want or need (3) at a price they're willing to pay, in a way that (4) satisfies the purchaser's needs and expectations and (5) provides the business sufficient revenue to make it worthwhile for the owners to continue operation.

(1) Value creation - requires market research - understand people's need (2)
(3) Attracting customers - requires marketing - make people interested
(4) Fulfill customer's need - requires value delivery and operations - deliver on promise to customers
(4) Satisfy customer - requires customer service - exceed customer's expectations
(5) Bring in money - requires finance - profit sufficiency

It's all about the PEOPLE and SYSTEMS.
Understand how human thinks and behaves. Systematic processes that can be repeated to produce desireable result.