Pinterest is a social media platform where users can create virtual pinboards to organize and share images they find online. It allows people to creatively showcase their interests. While mainly used for sharing beautiful pictures, Pinterest has benefits for search engine optimization through features like setting up a keyword-focused profile and boards and sharing links to multiple images on a webpage to build authority. Used strategically, Pinterest can be a source of free traffic for online businesses by driving relevant visitors from Pinterest to their websites and blogs.