A benchmark is a general term used in measuring the performance of a computer component or a software. It is of utmost importance for time critical systems to process the given input within minimum time frame. Intolerable delays in communications, online activities, meetings, or games are also annoying. Financial applications are sensitive to milliseconds, and cooperations are building global network infrastructures to reduce lag in transmission and computation.

An example to online metrics is https://grafana.wikimedia.org/ and https://grafana.wikimedia.org/d/000000377/host-overview . You can use any benchmark software that is suitable for your applications.