Digital signage uses computer-controlled displays to inform, entertain, and advertise to people in public spaces. There are different methods for digital signage including standalone signs or networked signs that can be updated remotely. Current technologies include various types of displays like LCD, plasma, and rear projection, as well as software and hardware based player systems. Best practices for digital signage include selecting a solution that matches requirements, testing content in real-world conditions, and designing short, impactful content. Emerging technologies promise more integrated and affordable digital signage solutions.