What is the best way to name an image file for SEO? It seems one way to get in the back door of a search engine would be to SEO your websites' images. Will using key words help? Should I separate the keywords by underscores? Any other characters that are bad or good? Max
Use appropriate keywords. i.e: keyword1-keyword2.jpg Also use the image alt tag. This would however not make a difference to your position on the SERP
use anything but remember - name should be short and related to pic - always add alt tag to it [for seo purpose] e.g let says you want to put an image of home on a home mortgage site http://www.abcofmortgage.com then try for name home-mortgage.jpg and add alt="Home mortgage Services" or other related keywords of the requirement
take a look at this article I wrote up a while back, it's about naming images http://www.ginside.com/2006/383/seo-tips-image-naming/ it's proof that it really does help.