How does AWS Auto Scaling help optimize costs?

Pay as per the usage concept. Scaling up will increase the capacity as per the utilization; scaling down will decrease the excess utilization to avoid overcharges.

What is AWS Auto Scaling, and how does it help improve application performance?

Auto scaling will automatically manage the application performance by scaling up and scaling down the capacity based on the optimization required.

what is AWS IAM service ?

What are some best practices for configuring AWS Auto Scaling groups?

What is AWS Auto Scaling, and how does it help improve application performance?