Game demos are short, playable versions of video games that allow players to experience a portion of the game before purchasing it. They typically showcase key features, gameplay mechanics, and graphics, giving players a taste of what to expect. Demos can be found on various platforms, including consoles and PCs, and are often available for free. These demos serve as a marketing tool for game developers to attract potential buyers by highlighting the game's strengths. Players can provide feedback based on their experience, which can help developers make improvements before the full release.