Final answer:
Delete markers in S3 Versioning are placeholders that indicate the deletion of an object in an S3 bucket. They allow you to track and recover previous versions of objects.
Step-by-step explanation:
Delete markers in S3 Versioning are used to keep track of objects that have been deleted in an S3 bucket. When you enable versioning for an S3 bucket, each time you delete an object, a delete marker is created to indicate the object's deletion. Delete markers do not actually remove the object from the bucket, but they serve as placeholders to indicate that the object has been deleted. For example, let's say you have versioning enabled for your S3 bucket and you have an object named 'file.txt'. If you delete 'file.txt', a delete marker will be created. If you decide to restore 'file.txt', the delete marker can be removed, and the previous version of 'file.txt' can be accessed and restored. This allows you to track and recover previous versions of objects in your S3 bucket.