Pinterest is a visual social media platform that allows users to save or "pin" things they find interesting like clothing, recipes, or DIY projects. It is primarily used by women, who make up 80% of users, to share their interests, get inspiration for future projects, and browse trends. Pinterest functions similarly to a shopping website, but without the cost, as users can browse ideas and plans without having to purchase anything. It is easy to use and encourages interaction between users as they follow each other and exchange pins.