E = Elasticsearch
Elasticsearch is a distributed search and analytics engine built on Apache Lucene. Since its release in 2010, Elasticsearch has quickly become the most popular search engine and is commonly used for log analytics, full-text search, security intelligence, business analytics, and operational intelligence use cases.
L = Logstash
Logstash is an open-source data ingestion tool that allows you to collect data from various sources, transform it, and send it to your desired destination. With prebuilt filters and support for over 200 plugins, Logstash allows users to easily ingest data regardless of the data source or type.
K = Kibana
Kibana is a data visualization and exploration tool used for log and time-series analytics, application monitoring, and operational intelligence use cases. It offers powerful and easy-to-use features such as histograms, line graphs, pie charts, heat maps, and built-in geospatial support. Also, it provides tight integration with Elasticsearch, a popular analytics and search engine, which makes Kibana the default choice for visualizing data stored in Elasticsearch

Winlogbeat
Winlogbeat is designed to capture and stream Windows event logs to Elasticsearch or Logstash.In this video, Beats developer Andrew Kroh introduces Winlogbeat and show us how to go from installing the Beat to visualizing your Windows event data in Kibana in the matter of minutes.