docs: fix metadata, update SLA link, apply style fixes

Author: duongau

articles/firewall/overview.md

@@ -1,19 +1,18 @@
 ---
 title: What is Azure Firewall?
-description: Azure Firewall is a managed, cloud-based network security service that protects your Azure Virtual Network resources.
+description: Azure Firewall is a cloud-native, intelligent network firewall security service that offers top-tier threat protection for your Azure cloud workloads.
 author: duongau
 ms.author: duau
 ms.service: azure-firewall
-services: firewall
 ms.topic: overview
 ms.custom: mvc, references_regions
-ms.date: 03/17/2025
+ms.date: 03/28/2026
 # Customer intent: As an administrator, I want to evaluate Azure Firewall so I can determine if I want to use it.
 ---
 
 # What is Azure Firewall?
 
-Azure Firewall is a cloud-native, intelligent network firewall security service that offers top-tier threat protection for your Azure cloud workloads. It is a fully stateful firewall as a service, featuring built-in high availability and unlimited cloud scalability. Azure Firewall inspects both east-west and north-south traffic. To understand these traffic types, see [east-west and north-south traffic](/azure/well-architected/security/networking#scope-of-influence).
+Azure Firewall is a cloud-native, intelligent network firewall security service that offers top-tier threat protection for your Azure cloud workloads. It's a fully stateful firewall as a service, featuring built-in high availability and unlimited cloud scalability. Azure Firewall inspects both east-west and north-south traffic. To understand these traffic types, see [east-west and north-south traffic](/azure/well-architected/security/networking#scope-of-influence).
 
 Azure Firewall is available in three SKUs: Basic, Standard, and Premium.
 
@@ -36,15 +35,15 @@ For more information, see [Azure Firewall features by SKU](features-by-sku.md#az
 
 ## Azure Firewall Standard
 
-Azure Firewall Standard offers L3-L7 filtering and threat intelligence feeds directly from Microsoft Cyber Security. It can alert and block traffic from/to known malicious IP addresses and domains, updated in real-time to protect against new and emerging threats.
+Azure Firewall Standard offers L3-L7 filtering and threat intelligence feeds directly from Microsoft Cyber Security. It can alert you to and block traffic from or to known malicious IP addresses and domains. It updates in real time to protect against new and emerging threats.
 
 :::image type="content" source="media/overview/firewall-standard.png" alt-text="Architecture diagram illustrating Azure Firewall Standard deployment with L3-L7 filtering and threat intelligence capabilities.":::
 
 For more information, see [Azure Firewall features by SKU](features-by-sku.md#azure-firewall-standard-features).
 
 ## Azure Firewall Premium
 
-Azure Firewall Premium provides advanced capabilities, including signature-based IDPS for rapid attack detection by identifying specific patterns. These patterns can include byte sequences in network traffic or known malicious instruction sequences used by malware. With over 67,000 signatures in more than 50 categories, updated in real-time, it protects against new and emerging exploits such as malware, phishing, coin mining, and Trojan attacks.
+Azure Firewall Premium provides advanced capabilities, including signature-based IDPS for rapid attack detection by identifying specific patterns. These patterns can include byte sequences in network traffic or known malicious instruction sequences used by malware. With over 67,000 signatures in more than 50 categories, updated in real time, it protects against new and emerging exploits such as malware, phishing, coin mining, and Trojan attacks.
 
 :::image type="content" source="media/overview/firewall-premium.png" alt-text="Architecture diagram illustrating Azure Firewall Premium deployment with advanced security capabilities including signature-based intrusion detection and prevention system (IDPS).":::
 
@@ -56,7 +55,7 @@ To compare all Azure Firewall SKU features, see [Choose the right Azure Firewall
 
 ## Azure Firewall Manager
 
-Azure Firewall Manager allows you to centrally manage Azure Firewalls across multiple subscriptions. It uses firewall policies to apply a common set of network and application rules and configurations to the firewalls in your tenant.
+Azure Firewall Manager provides a central place to manage Azure Firewalls across multiple subscriptions. It uses firewall policies to apply a common set of network and application rules and configurations to the firewalls in your tenant.
 
 Firewall Manager supports firewalls in both virtual network and Virtual WAN (Secure Virtual Hub) environments. Secure Virtual Hubs use the Virtual WAN route automation solution to simplify routing traffic to the firewall with just a few steps.
 
@@ -66,7 +65,7 @@ To learn more, see [Azure Firewall Manager](../firewall-manager/overview.md).
 
 For pricing details, see [Azure Firewall pricing](https://azure.microsoft.com/pricing/details/azure-firewall/).
 
-For SLA information, see [Azure Firewall SLA](https://azure.microsoft.com/support/legal/sla/azure-firewall/).
+For SLA information, see [Service Level Agreements (SLA) for Online Services](https://www.microsoft.com/licensing/docs/view/Service-Level-Agreements-SLA-for-Online-Services?lang=1).
 
 ## Supported regions
 
@@ -76,14 +75,14 @@ For a list of supported regions, see [Azure products available by region](https:
 
 To learn about the latest updates, see [Azure updates](https://azure.microsoft.com/updates?filters=%5B%22Azure+Firewall%22%5D).
 
-## Known issues
+## Known problems
 
-For known issues, see [Azure Firewall known issues](firewall-known-issues.md).
+For known problems, see [Azure Firewall known issues](firewall-known-issues.md).
 
 ## Next steps
 
 - [Quickstart: Create an Azure Firewall and a firewall policy - ARM template](../firewall-manager/quick-firewall-policy.md)
 - [Quickstart: Deploy Azure Firewall with Availability Zones - ARM template](deploy-template.md)
-- [Tutorial: Deploy and configure Azure Firewall using the Azure portal](tutorial-firewall-deploy-portal.md)
+- [Tutorial: Deploy and configure Azure Firewall by using the Azure portal](tutorial-firewall-deploy-portal.md)
 - [Learn module: Introduction to Azure Firewall](/training/modules/introduction-azure-firewall/)
 - [Learn more about Azure network security](../networking/security/index.yml)