Concepts descriptions.

Author: dominicbetts

articles/iot-central/core/concepts-architecture.md

@@ -1,6 +1,6 @@
 ---
 title: Architectural concepts in Azure IoT Central
-description: This article introduces key concepts relating the architecture of Azure IoT Central
+description: This article introduces key IoT Central architectural concepts such as device management, security, integration, and extensibility.
 author: dominicbetts
 ms.author: dobett
 ms.date: 11/28/2022

articles/iot-central/core/concepts-device-authentication.md

@@ -1,6 +1,6 @@
 ---
 title: Device authentication in Azure IoT Central
-description: This article introduces key concepts relating to device authentication in Azure IoT Central
+description: This article introduces key IoT Central device authentication concepts such as enrollment groups, shared access signatures, and X.509 certificates.
 author: dominicbetts
 ms.author: dobett
 ms.date: 10/28/2022

articles/iot-central/core/concepts-device-templates.md

@@ -1,6 +1,6 @@
 ---
 title: What are device templates in Azure IoT Central
-description: Azure IoT Central device templates let you specify the behavior of the devices connected to your application. A device template specifies the telemetry, properties, and commands the device must implement. A device template also defines the UI for the device in IoT Central such as the forms and views an operator uses.
+description: Device templates let you specify the behavior of the devices connected to your application. They also define a UI for the device in IoT Central.
 author: dominicbetts
 ms.author: dobett
 ms.date: 06/03/2022

articles/iot-central/core/concepts-faq-apaas-paas.md

@@ -1,6 +1,6 @@
 ---
 title: Move from IoT Central to a PaaS solution
-description: How do I move between aPaaS and PaaS solution approaches?
+description: This article discusses to move between application platform as a service (aPaaS) and platform as a service (PaaS) Azure IoT solution approaches.
 author: dominicbetts
 ms.author: dobett
 ms.date: 11/28/2022

articles/iot-central/core/concepts-faq-extend.md

@@ -1,6 +1,6 @@
 ---
-title: Extend IoT Central
-description: How do I extend IoT Central if it's missing something I need?
+title: How to extend IoT Central
+description: How to use data exports, rules, or the REST API to extend IoT Central if it's missing something you need.
 author: dominicbetts
 ms.author: dobett
 ms.date: 06/09/2022

articles/iot-central/core/concepts-iot-edge.md

@@ -1,6 +1,6 @@
 ---
 title: Azure IoT Edge and Azure IoT Central
-description: Understand how to use Azure IoT Edge with an IoT Central application.
+description: Understand how to use Azure IoT Edge with an IoT Central application including the different gateway patterns and IoT Edge management capabilities.
 author: dominicbetts
 ms.author: dobett
 ms.date: 10/11/2022

articles/iot-central/core/concepts-quotas-limits.md

@@ -1,6 +1,6 @@
 ---
 title: Azure IoT Central quotas and limits
-description: This article lists the key quotas and limits that apply to an IoT Central application.
+description: This article lists the key quotas and limits that apply to an IoT Central application including those from the underlying DPS and IoT Hub services.
 author: dominicbetts
 ms.author: dobett
 ms.date: 06/07/2022