Cloud Armor in the google cloud platform is a security feature similar to a network security group in Microsoft Azure.

This video will explain to you how to create policies under network security or cloud armor in GCP.
“Do you have a DDoS Defense? why not leverage the feature from cloud aromor? would like to create some flexible rules around network security?”
Advantage of GCP armor are:
Benefit from DDoS protection and WAF at Google-scale
Detect and mitigate attacks against your Cloud Load Balancing workloads
Mitigate OWASP Top 10 risks and help protect workloads on-premises or in the cloud
Key features of armor:
Visibility and monitoring: Easily monitor all of the metrics associated with your security policies in the Cloud Monitoring dashboard.