What is the main benefit of using Auto Scaling Groups?

The main benefit of using Auto Scaling Groups is the ability to automatically adjust the number of EC2 instances based on demand. This feature allows applications to scale up or down seamlessly in response to changing traffic patterns or workload requirements. For instance, during peak usage times, Auto Scaling Groups can launch additional instances to handle the increased load, ensuring that performance remains optimal. Conversely, during low traffic periods, the service can terminate excess instances to reduce costs. This automatic scaling capability enhances efficiency, cost-effectiveness, and resource management, allowing businesses to maintain consistent application performance without the need for manual intervention.

The other options, while relevant to different aspects of application management and infrastructure, do not capture the primary function and advantage of Auto Scaling Groups.