Deferred Update
Deferred Update allows the user to build a query without sending unnecessary intermediate results. It is a way to avoid expensive intermediate calculation and is very useful while editing a query.
Disable Deferred Update to let the query run automatically every time you apply a change in the Content Editor.
Enable Deferred Update to prevent the query from running automatically. You can click Update when you are ready to apply the necessary changes in the Content Editor and would like to run the query.