When using images on your website, consider adding text to the image title attribute. This title text often appears when the visitor hovers their mouse over the image making it a great place to add additional relevant information.
While you cannot count on the visitor ever seeing this text, it can be a nice additional touch for those who are looking for something a bit more. No, this isn’t a place to stuff keywords, but rather to provide additional content relevant to the visitor.
Tip: make sure all your title elements are unique and not just a re-iteration of your image file name!