Merge pull request #185453 from Grace-MacJones-MSFT/patch-14

(Azure CXP) mention app service is Paas offering

Author: PRMerger20

articles/app-service/overview.md

@@ -18,7 +18,7 @@ With App Service, you pay for the Azure compute resources you use. The compute r
 
 ## Why use App Service?
 
-Here are some key features of App Service:
+Azure App Service is a fully managed platform as a service (PaaS) offering for developers. Here are some key features of App Service:
 
 * **Multiple languages and frameworks** - App Service has first-class support for ASP.NET, ASP.NET Core, Java, Ruby, Node.js, PHP, or Python. You can also run [PowerShell and other scripts or executables](webjobs-create.md) as background services.
 * **Managed production environment** - App Service automatically [patches and maintains the OS and language frameworks](overview-patch-os-runtime.md) for you. Spend time writing great apps and let Azure worry about the platform.
@@ -87,4 +87,4 @@ Create your first web app.
 > [HTML (on Windows or Linux)](quickstart-html.md)
 
 > [!div class="nextstepaction"]
-> [Custom container (Windows or Linux)](tutorial-custom-container.md)
+> [Custom container (Windows or Linux)](tutorial-custom-container.md)