Pinterest is a social media application that allows users to create boards to organize and share items they find online, called pins. Users can pin recipes, crafts, fashion tips, and other content and categorize them into boards. It functions as a web-based community for open sharing of information. In education, Pinterest can be used to create class boards where students can explore topics and share findings with each other. Students can compile research on topics and pin information for other students to access conveniently without using class time. The tutorial explains how to sign up for Pinterest using Facebook for networking, create boards to organize bookmarks, and share pins and boards with others.