Bandwidth refers to the maximum amount of data that can be transmitted over an internet connection within a specific period, usually measured in megabits per second (Mbps) or gigabits per second (Gbps). It determines how quickly information can travel between your device and the internet. Higher bandwidth allows more devices to stream, download, or upload content simultaneously without slowing down the connection. In cybersecurity, understanding bandwidth is important for managing network performance and preventing congestion or data bottlenecks.