From the perspective of the needs of our modern life, what is the significance of the emergence of banknotes, trademarks, and advertisements Banknotes are more convenient to carry and exchange than previous metal currencies; trademarks can allow consumers to distinguish the quality of goods. sources, producers can effectively protect their own rights and interests; advertising can guide consumers to make purchases, and is also beneficial to merchants’ business activities. The emergence of all three illustrates the prosperity of the commodity economy in the Song Dynasty.