If you are a person who is, or has been in the past, in charge of inspecting and analyzing system logs in Linux, you know what a nightmare that task can become if multiple services are being monitored simultaneously.
In days past, that task had to be done mostly manually, with each log type being handled separately. Fortunately, the combination of Elasticsearch, Logstash, and Kibana on the server side, along with Filebeat on the client side, makes that once difficult task look like a walk in the park today.