The photo keywords are mainly used for the onsite photo search feature. (Keywords are NOT used for search engines! - Google has stated that they ignore keywords).
The more keywords and keyword phrase variations you include for your photos, the more accurate your onsite photo search results will be.
When you enter the keywords, separate each word or phrase with a comma and space.
Example Keywords: "Mount Sneffels, Mt. Sneffels, Mt Sneffels, Sneffels, San Juan Mountains, San Juans, Colorado, 14er, 14ers, fourteener, fourteeners, sunset, June"