To configure S3 object expiration policies, follow these steps:
Log in to the AWS Management Console and navigate to the S3 service.
Select the bucket for which you want to configure object expiration policies.
Click on the "Management" tab and then select "Lifecycle".
Click on the "Add lifecycle rule" button.
In the "Configure lifecycle rule" window, give your rule a name and select the objects you want to apply the rule to (e.g. all objects in the bucket, objects with a specific prefix).
Choose the action you want to take when the objects meet the criteria for the rule, in this case, select "Expire objects".
Set the number of days after creation date or last modification date when you want the objects to expire.
Click on the "Review" button to review your rule settings and then click on the "Create rule" button to save the rule.
Once the rule is created, it will automatically apply to the objects in the selected bucket based on the criteria and expiration settings you have configured.