Needs would be defined as goods or services that are required. This would include the needs for food, clothing, shelter and health care. Wants are goods or services that are not necessary but that we desire or wish for. For example, one needs clothes, but one may not need designer clothes.
How to know what customers needs and wants?
1Secure Sales by Knowing Your Customers in Depth24m
2How to Know What a Customer Needs & Wants?30m