To improve billing transparency and user control, Amazon Web Services (AWS) has introduced a feature allowing users to opt-in for email alerts when their monthly spend exceeds a defined threshold. This new feature was inspired by customer feedback and is now enabled by default, with the option to customize the alert amount. Users can access this feature through the Billing options of their account and will receive an email notification once per billing cycle if they exceed the limit. The goal of this feature is to provide users with greater control over their spending and ensure that unexpected bills are minimized.