Whenever possible, you should save your images, media, and web pages with the keywords in the file names. For example, if your keyword phrase is “golf putters” you’ll want to save the images used on that page as golf-putters-01.jpg or golf_putters_01.jpg (either will work). It’s not confirmed, but many SEO’s have experienced improvement in ranking by renaming images and media.

More important is your web page’s filename, since many search engines now allow users to query using “inurl:” searches. Your filename for the golf putters page could be golf-putters.html or golf_putters.html. Anytime there is an opportunity to display or present content, do your best to insure the content has the keywords in the filename (as well as a Title or ALT attribute).