add release notes

Author: gahl-levy

articles/cosmos-db/mongodb/vcore/TOC.yml

@@ -78,5 +78,7 @@
       href: how-to-create-indexes.md
 - name: Reference
   items:
+    - name: Release notes
+      href: release-notes.md
     - name: Troubleshoot common issues
       href: troubleshoot-common-issues.md

articles/cosmos-db/mongodb/vcore/release-notes.md

@@ -0,0 +1,30 @@
+---
+title: Change log for Azure Cosmos DB API for MongoDB vcore
+description: Notifies our customers of any minor/medium updates that were pushed
+author: avijitkgupta
+ms.author: avijitkgupta
+ms.reviewer: gahllevy
+ms.service: cosmos-db
+ms.subservice: mongodb
+ms.topic: release-notes
+ms.date: 03/07/2024
+---
+
+# Change log for Azure Cosmos DB for MongoDB vcore
+
+The Change log for the API for MongoDB is meant to inform you about our feature updates. This document covers more granular updates and complements [Azure Updates](https://azure.microsoft.com/updates/).
+
+## *[3 March'24]* Enhancements to `Explain` plan & Vector filtering abilities
+
+- Azure Cosmos DB for MongoDB vCore allows filtering by metadata columns while performing vector searches. 
+- `Explain` plan now offer different modes
+	- *allShardsQueryPlan*: Introduces a new explain mode to view the query plan for all shards involved in the query execution, offering a comprehensive perspective for distributed queries.
+	- *allShardsExecution*: Presents an additional explain mode to inspect the execution details across all shards involved in the query, providing users with comprehensive information for better optimization. 
+- Free Tier support added to East US 2
+- Ability for building indexes in background (Private Preview)
+
+## Next steps
+
+- Learn how to [use Studio 3T](connect-using-mongochef.md) with Azure Cosmos DB for MongoDB.
+- Learn how to [use Robo 3T](connect-using-robomongo.md) with Azure Cosmos DB for MongoDB.
+- Explore MongoDB [samples](nodejs-console-app.md) with Azure Cosmos DB for MongoDB.