Low latency refers to the minimal delay between the cause and effect of some physical change in the system being observed). In the context of computer networks, low latency describes a network that is optimized to process a high volume of data messages with minimal delay. Low latency is critical for real-time applications, where users expect feedback instantly when they perform an action. Latency is measured in milliseconds, and the closer to zero it can reach, the better. Low latency is desirable in a wide range of use cases, including online gaming, high-frequency trading in capital markets, and video streaming. Achieving the lowest latency possible determines which apps will be successful and continue to grow in the long run.