Central ideas are the main points or messages that an author wants to convey in a text. They serve as the foundation for the content, guiding the reader's understanding of the overall theme. Identifying the central idea helps readers grasp the purpose and significance of the material. In literature, central ideas often reflect the author's perspective on topics such as society, human nature, or conflict. In non-fiction, they can summarize key arguments or findings related to subjects like science, history, or technology. Recognizing these ideas enhances comprehension and critical thinking skills.