Hi @One Aieda ,
You don't need the end quotes for CLI commands but you do for powershell. Here's the Azure CLI commands for starting and stopping a web app:
Start a web app:
az webapp start --name MyWebapp --resource-group MyResourceGroup
Stop a web app:
az webapp stop --name MyWebapp --resource-group MyResourceGroup
The Start-AzureRmWebApp cmdlet starts an Azure Web App.
The Stop-AzureRmWebApp cmdlet stops an Azure Web App.
Ex: Stop-AzureRmWebApp -ResourceGroupName "Default-Web-WestUS" -Name "ContosoWebApp"
This command stops the Web App named ContosoWebApp that belongs to the resource group named Default-Web-WestUS.
Hope that helps.