Search engine traffic from images is extremely underrated, especially when some website have more images than contents. As search engines cannot “read” images and any content on the image you need to make sure this is placed in the descriptions, tags, and titles you give your images. By doing this not only does your site looks good to the public but also works well for SEO.
All images should have ALT and TITLE attributes defined. This is the image equivalent of the doc title or Meta Description for the website page.
Image filenames should have a relevant name, ideally with a keyword in it. For example, an image filename of “web123.jpg” might make sense to you, the website owner or the website design company that created your website, but won’t mean anything to a search engine. “website-design.jpg” is a much more descriptive, and relevant, filename.
E-commerce website design tends to be orientated around having plenty of images to make the product they selling look good, but what use is a e-commerce site if you are not getting much traffic. by following the above you will be placing key phrases for each category image, sub category image and product images, that is a lot of additional content and keywords which will surely help with search engine optimisation.