Final answer:
Public relations is the non-paid form of promotion, involving managing the spread of information to create a positive image through various communication channels.
Step-by-step explanation:
The non-paid form of promotion is public relations.
Public relations involves managing the spread of information between an individual or an organization and the public. It is the practice of creating and maintaining a positive image for an individual, company, or organization through various non-paid communication channels, such as press releases, media coverage, events, and social media.