Merge pull request #303428 from asudbring/us429364-seo-top25-vnet

SEO Top 25 - VNET best practices and concepts

Author: JamesJBarnett

articles/virtual-network/concepts-and-best-practices.md

@@ -1,21 +1,27 @@
 ---
-title: Azure Virtual Network - Concepts and best practices
-description: Learn about Azure Virtual Network concepts and best practices. 
+title: Azure Virtual Network Concepts and Best Practices
+description: Learn Azure Virtual Network concepts and best practices to design secure, scalable cloud infrastructure. Discover address spaces, subnets, regions, and security guidelines for optimal network architecture.
 author: asudbring
 ms.service: azure-virtual-network
 ms.topic: concept-article
-ms.date: 04/15/2025
+ms.date: 07/28/2025
 ms.author: allensu
 # Customer intent: As a network architect, I want to understand Azure Virtual Network concepts and best practices, so that I can design an efficient, secure, and scalable network infrastructure for my organization's cloud-based applications.
 ---
 
 # Azure Virtual Network concepts and best practices
 
-This article describes key concepts and best practices for Azure Virtual Network.
+Azure Virtual Network is a fundamental building block for your private network in Azure. It enables Azure resources to securely communicate with each other, the internet, and on-premises networks. 
 
-## Virtual network concepts
+A virtual network is similar to a traditional network that you'd operate in your own data center. However, it brings extra benefits of Azure's infrastructure such as scale, availability, and isolation.
 
-- **Address space:** When creating a virtual network, you must specify a custom private IP address space using public and private (RFC 1918) addresses. Azure assigns resources in a virtual network a private IP address from the address space that you assign. For example, if you deploy a VM in a virtual network with address space, 10.0.0.0/16, the VM is assigned a private IP like 10.0.0.4.
+Understanding virtual network concepts and following best practices helps you design robust, secure, and scalable network architectures. Whether you're migrating existing workloads to Azure or building new cloud-native applications, proper network design is essential for performance, security, and cost optimization.
+
+This article describes key Azure Virtual Network concepts and best practices to help you design efficient, secure, and scalable network infrastructure for your cloud-based applications. Learn about address spaces, subnets, security groups, and architectural guidelines that optimize your Azure networking strategy.
+
+## Virtual Network concepts
+
+- **Address space:** When creating a virtual network, you must specify a custom private IP address space using public and private (RFC 1918) addresses. Azure assigns resources in a virtual network a private IP address from the address space that you assign. For example, if you deploy a VM in a virtual network with address space, 10.0.0.0/16, a private IP similar to 10.0.0.4 is assigned to the virtual machine.
 
 - **Subnets:** Subnets enable you to segment the virtual network into one or more sub networks and allocate a portion of the virtual network's address space to each subnet. You can then deploy Azure resources in a specific subnet. Just like in a traditional network, subnets allow you to segment your virtual network address space into segments that are appropriate for the organization's internal network. Segmentation improves address allocation efficiency. You can secure resources within subnets using Network Security Groups. For more information, see [Network security groups](./network-security-groups-overview.md).
 
@@ -37,4 +43,4 @@ As you build your network in Azure, it's important to keep in mind the following
 
 ## Next steps
 
- To get started using a virtual network, create one, deploy a few VMs to it, and communicate between the VMs. To learn how, see the [Create a virtual network](quick-create-portal.md) quickstart.
+To get started using a virtual network, create one, deploy a few VMs to it, and communicate between the VMs. To learn how, see the [Create a virtual network](quick-create-portal.md) quickstart.