You can use free image-sharing sites like Instagram, Facebook, Twitter, Flickr for the promotion of your website. There are many benefits of image sharing on image submission sites like: Promote Products and Services: Nowadays, every individual loves to research before purchasing anything. The regular visitors to image sharing sites are more likely to visit your site provided you share informative and quality images. It will help you gain more website visits:  Facebook. Now you know about free image-sharing sites, you can use them and take advantage of image-sharing sites.