When the field "Use Deferred Stock Update" is used?

Hi All

Tell me please, when field Use Deferred Stock Update is used?

Thanks.
With Regards,
Vladislav

Found the answer, maybe for someone it information will be useful

Use Deferred Stock Update is feature of Enterprise Edition of Magento but why Magento used this feature in Community Version. In community Version This doesn’t affect product inventory.

Deferred stock updates is used for individual product or an entire website all proudct and Take benifits of the job queue mechanism to allow inventory levels to update asynchronously after the orders are placed. Its Enterprise Version feature.