HTTP(S) load balancing is a Google-recommended practice for distributing web traffic across multiple regions and zones, and providing high availability, scalability, and security for web applications. It supports both IPv4 and IPv6 addresses, and can handle SSL/TLS termination and encryption. It also integrates with Cloud CDN, Cloud Armor, and Cloud Identity-Aware Proxy for enhanced performance and protection. A MIG can be used as a backend service for HTTP(S) load balancing, and can automatically scale and heal the VM instances that host the web application.
To configure DNS for HTTP(S) load balancing, you need to create an A record in your DNS public zone with the load balancer's IP address. This will map your domain name to the load balancer's IP address, and allow users to access your web application using the domain name. A CNAME record is not recommended, as it can cause latency and DNS resolution issues. A private zone is not suitable, as it is only visible within your VPC network, and not to the public internet.
References:
* HTTP(S) Load Balancing documentation
* Setting up DNS records for HTTP(S) load balancing
* Choosing a load balancer