Possessive pronouns in Hindi grammar are used to show ownership or relationship between people, animals, or objects. These pronouns are generally placed before the noun they modify and agree in gender and number with the noun. The most common possessive pronouns in Hindi are मेरा (my), तेरा (your, informal), आपका (your, formal), हमारा (our), उनका (their), and इसका (its). Understanding and using possessive pronouns correctly is essential for clear and effective communication in Hindi.