Igrot Moshe is a collection of responsa written by Rabbi Moshe Feinstein, a prominent 20th-century Orthodox Jewish authority. The work addresses a wide range of Jewish law and ethical issues, providing guidance on contemporary matters faced by the Jewish community. Rabbi Feinstein's rulings are highly respected and widely referenced in Jewish legal discussions. The responsa were published in several volumes, covering topics such as Shabbat, kashrut, and family law. Rabbi Feinstein's approach combines traditional Jewish texts with a deep understanding of modern life, making his insights relevant for many. His contributions have had a lasting impact on Jewish legal thought.