PRODUCT USE NORMAL DAY is the commodity that ordinary consumers or buy without hesitation thinking and the effort to compare them
PRODUCTS Chosen before purchase: is the normal consumer products By comparison, consider the indicators, utility, quality, price
PRODUCTS WITH SPECIAL NEEDS are the products satisfy the special needs and the buyers are willing to give extra effort to find it.
PRODUCT DEMAND BY PASSIVE is the product that consumers do not know or know but injured no thought of buying them.
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