Identifying the background of an image is sometimes complicated. For example, an image may appear in its original context or in a different situation, used seriously, humorously, or allusively.
What is the context for the image? If it is an ad, when and where did it run? If it is a photograph, painting, or other work of art, who is the artist? Where and how has it been published, circulated, or exhibited?
What is the purpose of the image?
What audience does it aim to attract? How does it appeal to viewers?