Congress reviews major weapons sales to other countries before they can go through, and this resolution would block a specific arms sale to Israel that the executive branch had proposed, meaning the defense equipment and related services listed in that deal would not be sold to Israel. In practice, this is Congress using its authority to say no to a particular sale the administration had lined up, rather than approving it automatically. The resolution doesn't address any other arms sales or broader policy toward Israel — it applies only to this one specific proposed transaction.