The Practical Keyworder - A Checklist Manifesto
Demographic/time and place: Be specific about the people in your photograph, their general age, their role in life and any other relevant details. Advertisers target particular markets based on age, stages of life and ethnicity and these are vital to include in the keywords. This sample image includes the keywords ADULTS (I would actually be even more specific about an age range), GRANDPARENTS, CHILDREN and GENERATIONS. Time and place are necessary to include as well. I've seen many images that do not indicate whether the photo was taken outdoors, indoors, in natural daylight or in a studio. Include this information - it's vital! The sample image indicates an outdoor setting but omits the crucial time/place keywords BEACH and SUMMER. It also does not indicate the number of people, which can be important - many users look for groups or single subjects.
Compositional/aesthetic: The dominant colors and compositional aspects of an image are important qualities for end-users and so they must be included. Compositional aspects can include CANDIDS or PORTRAITS; subjects LOOKING AT CAMERA; ACTIVE; CLOSE-UPS; DAYLIGHT; SINGLE SUBJECT; COPY SPACE etc. The sample image here does NOT include many of these elements.
This sample photograph was successful, but how much more successful would it have been had it included more keywords in essential categories? Let's compare the keywords of the bestselling image of a family on a beach, very similar to the sample image, with the sample's keywords.
There are fewer keywords overall, but they hit all the major categories! Concepts: yes - LEISURE, FAMILY, TRAVEL, VACATION
Demographics/time/place: yes -ADULTS, CAUCASIAN, CHILD, TEEN, GROUPS, BEACH, OCEAN, OUTDOORS
Compositional/aesthetic: yes - PORTRAIT, POSED, COLOR, SPACE (copy space), HORIZONTAL IMAGE