Judicial review holds significant importance in political systems by ensuring that laws and executive actions comply with constitutional principles. This process allows courts to interpret the law and protect citizens' rights against potential government overreach. By providing checks and balances, judicial review reinforces the rule of law and promotes accountability within the political framework. This judicial function is crucial in safeguarding democracy, as it empowers the judiciary to overturn unjust laws and uphold the fundamental rights of individuals, ensuring a fair system of governance.