N/m² is indeed a valid SI unit, representing pressure, and is commonly referred to as a pascal. While combinations of SI units can form new units, not all combinations have unique names or represent distinct physical quantities. The discussion highlights that while N/m² is a legitimate unit, it is essential to recognize that it specifically denotes pressure. The distinction between combinations of SI units and their assigned names is crucial for clarity in scientific communication. Overall, N/m² is an accepted SI unit, but its specific application as pressure is what defines its significance.