Publicity is a way of promoting a person or product or service, to get their name in front of the public and ensure that more and more people know about them. Methods of publicity include magazine and newspaper ads, television and radio promotion, and direct mail efforts. A good publicity campaign also includes a good copywriter.
Information that attracts attention to a company, product, person, or event
It means advertising or making it public (letting the public know) through print or visual media (TV, newspapers, magazines, radio, billboards, etc).
Promotion: A message issued in behalf of some product or cause or idea or person or institution