Azure Advisor is a free personalized cloud consultant which helps you manage the computing resources and cost based on your need. It can advise you to add, remove certain resources based on the usage.
This is a great tool and this needs to be utilized by everyone. You can access this tool through the Azure portal in the Navigation Menu or you can always search in “All Services” menu.
Advisor can help you recommend resources on Application Gateway, AZURE Data Factory,Azure Cosmos DB, AZURE Synapse, Virtual machines and others.
You can get a complete overview of what is an Azure Advisor here
