Should we use a special plugin to let the google crawl bots to know we are using images on our site ?
There are some sitemaps for “Images” as well bro, but I dunno how effective they are though. You just need to optimize your images well.
Compress your images, we don’t really need 10MB or 15MB files just for viewing.
Use proper filename, title and alt tags.
Make sure the images on your website are not broken anywhere.