As the quantity of and access to images and sounds increase, all of us—and especially children—need to remember that all media are made by people with a specific purpose in mind.
The skill and artistry of media professionals make it increasingly difficult to separate the real world from the crafted worlds represented in a wide range of media formats. Media literacy allows audiences to appreciate the best of the art form while increasing their awareness of subtle, as well as overt, messages.
Source: National Endowment for the Arts. "Introducing Your Child to the Arts: Media Literacy"