By now you should already know Azure Security Center (ASC), the unified one-stop shop security management for Azure, providing you details about your security posture and potential improvements.
Well, you can now define automation workflow (in preview) to automate actions based on detection alerts or security center recommendations.
Automation workflow uses Logic App to execute actions you will define so the potential activities are endless
To start using it, logon to your Azure portal (https://portal.azure.com/) and reach out the Security Center blade
Then access the Workflow automation blade available in the Overview section
Then you can create (or edit existing automation flow once you have created some) workflow automation
When creating an automation workflow you define: