he/she should (conditional)
'deber' is slightly more formal than 'tener que'. Can express strong obligation or mild suggestion.
He/She should study more if they want to pass.
She should rest instead of working so much.
—What do you think of the plan? —He should review it before approving it.
She should rest instead of working so much.
—What do you think of the plan? —He should review it before approving it.