What is a counter-metric and why is it needed?

Counter-metric is a metric that tracks the cumulative number of events or operations, such as clicks, requests, or errors. It always increases and does not decrease.

Why is a counter-metric needed:

• It allows measuring the total volume of activity over time.
• Helps identify trends and anomalies in product performance.
• Used for calculating performance and load.

For example, if counting the number of user registrations, a counter-metric will show the total number of registered users since the start.