Add Examples Using Service Tags and Add Description to Parameter (#14630)

* Updated Example and Parameter Description

Updated Example and Parameter Description with new Service Tag info

* Added info on new Service Tag functionality

Added example and updated parameter descriptions

* Updating Command with  Service Tag functionality

Added example and edited parameter to explain how Service Tags can be used as address prefixes

Author: allegradomel

src/Network/Network/help/Add-AzRouteConfig.md

@@ -84,10 +84,21 @@ This command gets the route table named RouteTable01 by using **Get-AzRouteTable
 The command passes that table to the current cmdlet by using the pipeline operator.
 The current cmdlet adds the route named Route02, and then passes the result to the **Set-AzRouteTable** cmdlet, which updates the table to reflect your changes.
 
+### Example 3: Add a route with a Service Tag to a route table (Public Preview)
+```powershell
+PS C:\>$RouteTable = Get-AzRouteTable -ResourceGroupName "ResourceGroup11" -Name "RouteTable01"
+PS C:\> Add-AzRouteConfig -Name "Route13" -AddressPrefix "AppService" -NextHopType "VirtualAppliance" -NextHopIpAddress "10.0.2.4" -RouteTable $RouteTable
+```
+
+The first command gets a route table named RouteTable01 by using the Get-AzRouteTable cmdlet.
+The command stores the table in the $RouteTable variable.
+The second command adds a route named Route13 to the route table stored in $RouteTable.
+This route forwards traffic to IP prefixes contained in the AppService Service Tag to a virtual appliance. 
+
 ## PARAMETERS
 
 ### -AddressPrefix
-Specifies the destination, in Classless Interdomain Routing (CIDR) format, to which the route applies.
+Specifies the destination, in Classless Interdomain Routing (CIDR) format, to which the route applies. You can also specify a Service Tag here (this feature is in Public Preview).
 
 ```yaml
 Type: System.String

src/Network/Network/help/New-AzRouteConfig.md

@@ -50,10 +50,17 @@ Creates a route for a route table. (autogenerated)
 New-AzRouteConfig -AddressPrefix 10.1.0.0/16 -Name 'Route07' -NextHopIpAddress '12.0.0.5' -NextHopType 'VnetLocal'
 ```
 
+### Example 3: Create a route with a Service Tag (Public Preview)
+```powershell
+New-AzRouteConfig -Name "Route07" -AddressPrefix "AppService" -NextHopType "VirtualAppliance" -NextHopIpAddress "10.0.2.4"
+```
+
+This command creates a route named Route07 which forwards traffic to IP prefixes contained in the AppService Service Tag to a virtual appliance. 
+
 ## PARAMETERS
 
 ### -AddressPrefix
-Specifies the destination, in Classless Interdomain Routing (CIDR) format, to which the route applies.
+Specifies the destination, in Classless Interdomain Routing (CIDR) format, to which the route applies. You can also specify a Service Tag here (this feature is in Public Preview).
 
 ```yaml
 Type: System.String

src/Network/Network/help/Set-AzRouteConfig.md

@@ -64,10 +64,17 @@ This command gets the route table named RouteTable01 by using the Get-AzRouteTab
 The command passes that table to the current cmdlet by using the pipeline operator.
 The current cmdlet modifies the route named Route02, and then passes the result to the **Set-AzRouteTable** cmdlet, which updates the table to reflect your changes.
 
+### Example 2: Modify a route using a Service Tag (Public Preview)
+```powershell
+Set-AzRouteConfig -Name "Route02" -AddressPrefix "AppService" -NextHopType "VirtualAppliance" -NextHopIpAddress "10.0.2.4"
+```
+
+This command modifies the route named Route02, supplying a Service Tag as the AddressPrefix parameter.
+
 ## PARAMETERS
 
 ### -AddressPrefix
-Specifies the destination, in Classless Interdomain Routing (CIDR) format, to which the route applies.
+Specifies the destination, in Classless Interdomain Routing (CIDR) format, to which the route applies. You can also specify a Service Tag here (this feature is in Public Preview).
 
 ```yaml
 Type: System.String