Occasionally, a student will suggest that his or her product or service is unive

Occasionally, a student will suggest that his or her product or service is universally needed, such as providing a haircut. Therefore, they plan to target everyone. Why is this not a good idea? What criteria should be used to determine which market segment(s) to target?

"Get 15% discount on your first 3 orders with us"
Use the following coupon
"FIRST15"

Order Now