The title might be confusing by itself, so let us briefly describe each of the elements mentioned in it.
Prometheus alerts and Grafana notifications serve the same purpose, even though we did not explore the latter. I'll let you learn how Grafana notifications work on your own. Who knows? After the discussion that follows you might not even want to spend time with them.
Grafana notifications can be forwarded to different recipients in a similar manner as how Prometheus' alerts are forwarded with Alertmanager. However, there are a few things that make Grafana notifications less appealing.
If we can accomplish the same result with Prometheus alerts as with Grafana alerts, there is a clear advantage with the former. If an alert is fired from Prometheus, that means that the rules that caused the...