The address "192.168.255.255" is a special type of IP address known as a broadcast address. It is used in local networks to send messages to all devices at once. When a device sends data to this address, all devices within the same network receive the information, making it useful for communication and updates. This address falls within the private IP address range, specifically reserved for use in home and office networks. Devices like routers and computers often use private IP addresses to communicate without being directly accessible from the internet, enhancing security and organization within the network.