Kibana
In plain terms
A visualization tool for Elasticsearch data.
Going deeper
Kibana provides dashboards and search interfaces over data stored in Elasticsearch, completing the ELK stack for log analytics. It makes logs explorable.
Under the hood
Visualizes logs and metrics indexed in Elasticsearch; the 'K' in the ELK/Elastic Stack.
Examples
Log analytics, ELK stack, dashboards, search, observability, security analytics.
Think of it like...
Like a search-and-dashboard window into a giant pile of indexed logs.