What is Logstash?
Logstash is a tool for managing events and logs. You can use it to collect logs, parse them, and store them for later use (like, for searching). If you store them in Elasticsearch, you can view and analyze them with Kibana.
Logstash is a tool in the Log Management category of a tech stack.
Why developers like Logstash
Easy but powerful filtering
Kibana provides machine learning based analytics to log
Great to meet GDPR goals