Adding info about Multi-database client in README.md

Author: petyaslavova

README.md

@@ -194,6 +194,16 @@ By default, the client now overrides the server-side dialect with version 2, aut
 
 You can find further details in the [query dialect documentation](https://redis.io/docs/latest/develop/interact/search-and-query/advanced-concepts/dialects/).
 
+### Multi-database client (Active-Active)
+
+The multi-database client allows your application to connect to multiple Redis databases, which are typically replicas of each other. It is designed to work with Redis Software and Redis Cloud Active-Active setups. The client continuously monitors database health, detects failures, and automatically fails over to the next healthy database using a configurable strategy. When the original database becomes healthy again, the client can automatically switch back to it.<br>
+This is useful when:
+
+1. You have more than one Redis deployment. This might include two independent Redis servers or two or more Redis databases replicated across multiple [active-active Redis Enterprise](https://redis.io/docs/latest/operate/rs/databases/active-active/) clusters.
+2. You want your application to connect to one deployment at a time and to fail over to the next available deployment if the first deployment becomes unavailable.
+
+For the complete failover configuration options and examples, see the [Multi-database client docs](https://redis.readthedocs.io/en/latest/multi_database.html).
+
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