Pricing

What are resource locks:

Azure uses resource locks as a defense against unintentional destruction or alteration of important resources. A locked resource can’t be deleted or changed until the lock is released. Any resource in an Azure subscription, including resource groups, virtual machines, storage accounts, and databases, can have a resource lock applied to it....

Why are Resource Locks Important:

For Azure’s important resources to be available and secure, resource locks are crucial. Without resource locks, unintentional resource deletion or change could lead to system outages, data loss, or security breaches. Resource locks add an extra degree of defense against mistakes made by people, flawed software, and malicious attacks....

Advantages and Disadvantages of Azure Resource Locks:

Advantages:...

So now we know what are resource locks but, but How to Apply Resource Locks in Azure:

The Azure Portal, Azure CLI, Azure PowerShell, or Azure Resource Management (ARM) templates can all be used to apply resource locks....

Pricing:

There is no direct cost associated with Azure resource locks. Azure offers the free functionality of resource locks, which lets you lock a resource or a resource group to stop unintentional deletion or change. The pricing of the resources that depend on a resource may change if you apply a resource lock to it, so keep that in mind. If you apply a read-only lock, for instance, to a storage account, it might prevent any modifications from being made to the account and have an effect on any services that depend on it. This may have an effect on how those services are used and billed....