In order to distribute images effectively, we must use the most commonly accepted protocol, which is an URL link that looks like this: http://www.mywebsite.com/image.jpg
You can link to any type of common image file such as .jpg, .gif, .png, and .bmp. The advantage is that you can post updated images to the same location using the same file name, meaning that you do not have to resubmit an image file in order to change your logo or photo. No two directories publish the same list of content elements, so images may not display on some sites. Our recommendation is that image files should be no larger than 1MB and 1024 x 1024 pixels.
Follow protocol and use URLs!