What effect does a Supreme Court ruling have on lower courts?

A Supreme Court ruling sets a binding precedent for all lower courts, which means that when the Supreme Court interprets a law or the Constitution, lower courts are required to follow that interpretation in future cases. This principle is known as "stare decisis," which encourages consistency and stability in the law by ensuring that similar cases are treated in the same way. The decisions made by the Supreme Court are the highest authority in the judicial system, and lower courts must apply those rulings to ensure uniformity in legal standards across the country. As a result, when the Supreme Court makes a decision, it establishes a legal framework that lower courts must adhere to, influencing their judgments in subsequent related cases.