how to block a user from publishing a node in drupal 7

Question

Please tell me that the user creates a node and he or she cannot publish that node on website and administrator can review that node and then the administer publish that node....

Answer 1

There is workflow module which suits your requirement.

The workflow module allows the creation and assignment of arbitrary workflows to Drupal node types. Workflows are made up of workflow states. For example, a workflow with the states Draft, Review, and Published could be assigned to the Story node type.

Answer 2

consider using the workbench module suite it gives you full control who can do what, and introduces states, like needs review.

with the publish content module you have a simpler approach. only permissions.