Precedent refers to principles or rules established by higher courts that lower courts must follow when deciding similar cases. Binding precedents come from superior courts within the same hierarchy, while persuasive precedents from other hierarchies or courts of equal rank can be considered but are not obligatory. The Supreme Court's rulings are binding on all Indian courts, though it is not bound by its own precedents. Precedents promote predictability, stability, fairness and efficiency but also present challenges like distinguishing key ratios and tracking numerous rulings. Overall, precedents are an important source of law but require effective recording mechanisms.