When it comes to security, Microsoft has a wide range of solutions that span across IaaS, PaaS, SaaS, Compliance and more. This is represented in the Microsoft Cybersecurity Reference Architecture (http://aka.ms/MCRA):

When it comes to securing IaaS and PaaS workloads in Azure, on-premises and 3rd party clouds, this is where Azure Security Center comes in. (See my overview video here). This product is full of features and capabilities, so in this blog you will find resources to get you started on your journey of learning Azure Security Center.

Read this documentation first (mandatory):

Watch these videos next (mandatory):

Then go do this (mandatory):

Lastly, do this:

Lab it up! (use your MSDN subscription!) Read the documentation! (Yes, you read that right) Watch more Ignite videos on Azure Security!