Bandwidth refers to the maximum rate of data transfer across a network path or the capacity of a connection. It is typically measured in bits per second (bps) and indicates how much data can be transmitted in a given amount of time. In the context of internet connectivity, higher bandwidth allows for more data to be sent and received simultaneously, enabling faster downloads, smoother streaming, and improved performance for online applications. Bandwidth can be affected by various factors, including network congestion, quality of service, and the physical medium of transmission, such as fiber optic, coaxial cable, or wireless connections. It is an essential concept in networking and telecommunications, influencing the performance and efficiency of data communication.