Latency (also called delay or ping) is the time it takes data to travel from your device to a server and back. It is measured in milliseconds (ms).
When downloading a file you barely notice latency. With video calls, online collaboration and applications that need to respond instantly, you certainly do. High latency causes jerky video and people talking over each other.
Latency is therefore not the same as bandwidth. A connection can have plenty of capacity and still feel slow. That is why we measure both during an IT-Label audit.
What does this mean for the IT-Label?
Latency is one of the points explicitly mentioned under Connectivity, alongside the type of connection, capacity, redundancy, speed and stability. Under Performance, the connection's real-world behaviour is measured. Low latency matters especially for video calls and applications that need to respond instantly. See also bandwidth and SD-WAN.