Answer:
Public relations
Step-by-step explanation:
It is the management of spreading information between a person and the general public or between an organization and the general public. The spreading of information does not require money to be exchanged unlike marketing and advertisement campaigns.
It is generally used for something that is new i.e., the public has no previous knowledge of the product. Generally public relations takes place through designing of communications campaigns, writing news releases and other content of the product.