What do cracks in render mean?

I'm curious, what exactly do cracks in render signify? Are they simply aesthetic imperfections, or do they indicate deeper issues? Could these cracks be an indication of structural weakness or a potential source of water infiltration? Moreover, what steps should be taken to address these cracks and prevent further damage? It's crucial to understand the significance of these cracks, especially in a context where the integrity of the structure is paramount. Could you please elaborate on this matter?