An image filename is a unique name used to identify an image in a file system. It consists of a name we assign to it ourselves and a file format.

The filename is your chance of explaining the image content to the crawlers. It should:

  • be readable to humans (don’t name your image IMG_025.jpg)
  • be as descriptive as possible
  • but try and keep it short – don’t use stop words like a, the, it, to etc
  • be somewhat unique (using names like shoe1.jpg, shoe2.jpg, shoe3.jpg will not help you much)
  • include keywords
  • use hyphens (dash) instead of underscores