Min 7 key words per image must be relevant to the image.
You need to read and understand what you are doing on the individual websites however key words can be used the same across all websites and titles
YOu will need
Give photo a title
Choose the category that best fits the photo
given at least 7 key words with the most relevant first
you can use my [url removed, login to view] as a reference point you need to be as accurate as possible as they can get rejected on wrong category or not relevant key words