Pinterest boards are virtual collections where users can save and organize images, links, and ideas from the internet. Each board can focus on a specific theme, such as home decor, recipes, or travel destinations. Users can create multiple boards to categorize their interests and inspirations. When users find something they like, they can "pin" it to their chosen board. This allows for easy access and sharing of ideas with others. Boards can be public or private, enabling users to collaborate with friends or keep their collections personal.