A public service announcement (PSA) or public service ad is a type of advertising featured on television, radio, print or other media. Whereas the objective of a standard advertisement is to market a product, a PSA is intended to change the public interest , by raising awareness of an issue, affecting public attitudes, and potentially stimulating action.
The most common topics of PSAs are health and safety. A typical PSA is part of a public awareness campaign to inform or educate the public about an issue such as obesity or compulsive gambling. The range of possible topics has expanded over time.
From time to time a charitable organization enlists the support of a celebrity for a PSA; examples include actress Kathryn Erbe telling people to be green and Crips street gang leader Stanley "Tookie" Williams speaking from prison to urge youth not to join gangs. Some PSAs tell people to adopt animals instead of buying them. Protecting our Earth, also known as being green, is another example of a current PSA topic.
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