If you are interested to know more about the topics that have been covered, you can check the following links:

• Creating an application gateway and virtual machine scale set using Azure PowerShell: https://docs.microsoft.com/en-us/azure/application-gateway/tutorial-create-vmss-powershell
• Application Gateway redirect overview: https://docs.microsoft.com/en-us/azure/application-gateway/application-gateway-redirect-overview
• Configuring App Service Web Apps with Application Gateway: https://docs.microsoft.com/en-us/azure/application-gateway/application-gateway-web-app-powershell
• Using load balancing services in Azure: https://docs.microsoft.com/en-us/azure/traffic-manager/traffic-manager-load-balancing-azure?toc=%2fazure%2fapplication-gateway%2ftoc.json