Answer:Public Relations
Explanation:
Public relations refer to how an organization maintains a health and beneficial mutual communication between an organization and the public. The company maintains its image in such a way that it remains the favoured organization.
This means the company creates an image for itself in a way that people are able to even talk about it and spread the word about how good their product is.
For example when the product is being mentioned in a newspaper everyone will read about it and the word may even be spread beyond boarders, which increases a brand knowledge of that product; this is done at no cost to the company so it is like a free advertisements.
People are inclined towards believing a testimony from someone who has used a product more than they would believe a paid advertisement.