Earned media
Also called: earned media
By earned media, we mean all forms of third-party attention that a company or brand has "earned. Examples include word-of-mouth advertising, conversations on social media and positive reviews.
With earned media, companies themselves have no control over the content of the communication. It is others who talk about their products. At most, you can get this free publicity going with good products and services, by inviting customers to speak up and by being open to constructive criticism.
Other categories into which media, resources and budget can be divided besides earned media are owned media and paid media.