Yes, image names do matter for SEO. Again, this is another opportunity to feed information to Google about what is on your website. It may be easy to just upload images with whatever file name your device assigned, but it’s important to rename the file so it describes your image. This is also another opportunity to use a keyword, but again it needs to be natural and actually describes the image. When you accurately name your images and use appropriate alt text, it can definitely bump up your SEO.