Formalism and New Criticism revolutionized literary analysis in the 20th century. These approaches shifted focus from external contexts to the intrinsic qualities of texts, emphasizing form, structure, and literary devices. They introduced concepts like defamiliarization and close reading, reshaping how we understand and interpret literature. These movements had a lasting impact on literary studies. While criticized for neglecting historical and social contexts, their emphasis on textual analysis and the autonomy of literary works continues to influence modern criticism and teaching methods.