Network latency refers to the time it takes for data to travel from one point to another in a network. This delay can occur due to various factors, including the distance between devices, the speed of the connection, and the amount of traffic on the network. Lower latency is generally preferred, as it leads to faster response times and a smoother user experience. High latency can negatively impact activities such as online gaming, video conferencing, and streaming. It can cause delays, buffering, and interruptions, making it essential for users and businesses to monitor and optimize their network performance to ensure efficient communication and data transfer.