A terabit (Tb) is a unit of digital information storage or transmission, equivalent to 10^12 (1 trillion) bits. It's commonly used to quantify the capacity or speed of data transfer in telecommunications, computing, and networking. Terabits are particularly relevant in discussions about high-speed internet connections, data center capacities, and telecommunications infrastructure. This unit represents a massive amount of data, often used in contexts where large-scale information processing or transmission is involved, such as streaming high-definition video, scientific research, or cloud computing services.