Is it better to have high or low latency?

Typically, anything at 100ms is acceptable for gaming. However, the 20ms to 40ms range is considered optimal. So simply put, low latency is good for online gamers while high latency can present obstacles.

Low latency describes a computer network that is optimized to process a very high volume of data messages with minimal delay (latency). These networks are designed to support operations that require near real-time access to rapidly changing data.