Majoritarianism is significant in politics as it reflects the principle that the majority's preferences should guide decision-making, forming the basis of many democratic systems. It is crucial for legitimizing government actions and policies, as it aligns with popular support. However, excessive reliance on majoritarianism can threaten minority rights and lead to tyranny of the majority. Balancing majoritarian principles with protections for minority voices is essential to ensure fairness and maintain a truly democratic framework, fostering social cohesion and inclusivity.