Poster boards are large, flat surfaces typically made of cardboard or foam that are used for presentations, displays, and projects. They come in various sizes and colors, making them versatile for different purposes, such as school projects, art displays, or advertising. These boards can be easily decorated with markers, glue, and other materials to showcase information or artwork. Often used in educational settings, poster boards help convey ideas visually, making them effective tools for communication and creativity. They are commonly found in classrooms, community events, and trade shows.