To help me with this, I like using Azure Security Center. It offers a significant amount of insight into my Azure Resources and comes in two pricing tiers at the moment. I recommend the Standard tier for most organizations, as it is well worth the monthly fee, as you can see here:
Security Center Pricing
Security Center is a useful tool, even in the free tier, to help with securing your Azure resources, or if nothing else, giving you extra eyes for security, as you can see here:
Security Center Dashboard ...
