Photo stock sites can greatly benefit from SEO practices. By optimizing the content on the site and creating backlinks to the site, businesses can increase their visibility in search engines and drive more organic traffic. To start, make sure the content on the site is well-written and optimized for the right keywords. Additionally, create backlinks to the site through other websites and blogs. Finally, using social media to promote the site is a great way to increase traffic and spread the word. Taking these steps can help maximize the audience for photo stock sites.