I've question about Google images. We've an ecommerce site and when i analyse to traffic sources, images searches are so so less. Our product images are in different domain and we're using cdn service. For example, our site is a.com and product images under to a.net .
So should we serve the images under a.com ? How can i improve to images search traffic? I need to advices about how can i improve to images search traffic.
Note: Images already optimized with alt tag, file name (product-title.jpg), images alt and file names are relates to product pages and metatags etc..