Sine your images support your content as an important source of information, it helps to provide search engines additional details about your images. An image sitemap let you provide the URL of images and other useful information. Image sitemaps may use URLs from other domains, unlike regular sitemaps, which must adhere to cross-domain restrictions. You can use a CDs (content delivery network) to host images. In this case, first verify the CDN’s domain name in your Google Search Console so that image crawl errors can propagate correctly.