Pinterest is a social media platform that allows users to create and share collections of images, videos, and other visual content on pinboards. Users can browse pinboards created by others for inspiration, and "re-pin" or "like" images to their own boards. The platform aims to connect people through things they find interesting. Pinterest launched in 2009 and grew rapidly, reaching over 12 million users. Most Pinterest users are women between the ages of 25-44 who use the site to organize ideas, find inspiration, and get creative. The document discusses how technical communicators can take advantage of features like email notifications, contests, and analytics to engage audiences.