diff --git a/persistence-modules/spring-data-elasticsearch/README.md b/persistence-modules/spring-data-elasticsearch/README.md
index 22126c2f00..dfa581a59a 100644
--- a/persistence-modules/spring-data-elasticsearch/README.md
+++ b/persistence-modules/spring-data-elasticsearch/README.md
@@ -6,6 +6,7 @@
 - [Guide to Elasticsearch in Java](https://www.baeldung.com/elasticsearch-java)
 - [Geospatial Support in ElasticSearch](https://www.baeldung.com/elasticsearch-geo-spatial)
 - [A Simple Tagging Implementation with Elasticsearch](https://www.baeldung.com/elasticsearch-tagging)
+- [What Is Elasticsearch?](https://www.baeldung.com/java-elasticsearch)
 
 ### Build the Project with Tests Running
 ```