CliffsNotes are study guides that provide summaries and analyses of literary works, helping students understand key themes, characters, and plots. They are designed to assist learners in grasping complex texts and preparing for exams or assignments. Originally created in 1958 by Clifford H. Brown, CliffsNotes have become a popular resource for students across various subjects. The guides cover a wide range of topics, including classic literature, modern novels, and even subjects like mathematics and science.