A projector is an optical device used to display visual content, such as images, videos, presentations, or slides, on a large screen or surface. It works by projecting light through a lens, which then magnifies and projects the image onto a screen or wall. Projectors are commonly used in various settings, including classrooms, boardrooms, theaters, home entertainment systems, and business presentations. They come in various types, including digital projectors (such as LCD and DLP projectors), overhead projectors, and slide projectors. Projectors have become essential tools for sharing information and multimedia content in both professional and personal environments, offering a way to amplify visual content for a larger audience.