image can be source of traffic, images with good alt and title can help your website to get more impressions... so sure images are good for seo just like the content...
Yes, it can add a significant boost in your SEO, only if you do it properly. Once you upload the image of your choice, make sure to make the "Alt Tag" & "Title" of that image match with your desired keyword. It's actually one of the most important indicators in on-page optimization other than H1 Tags, etc. To Your Success, Marc
Yes, right relevant and attractive Image attracts people to land at website and read about our product and services.