This document defines the key elements and essentials of a valid contract under Indian law. It discusses that a contract requires two parties, a definite offer and acceptance, consideration, lawful purpose and intent to create legal obligations. It provides examples of case laws that further explain these requirements like there must be intent to create legal binding agreement, consideration must be given with consent of promisor, minor's agreements are void etc. It also defines what makes a contract void or voidable like lack of free consent, illegality of purpose, failure to meet essential elements.