Answer:
niche marketing
Step-by-step explanation:
College Prep Tutors uses a method of marketing technique known as niche marketing. Many advertising companies uses such marketing strategies.
Niche marketing technique is a marketing technique which is used to target only a particular type of people. They remain focus to a particular kind and mainly focuses on particular age group of people, or a unique target market.
In niche marketing, instead of offering the product to everyone, the product is focused on a specific group who would draw maximum benefits from the product.
Thus, College Prep Tutors uses "niche marketing" as a target marketing strategy.