A subheading is a secondary title that appears below a main heading in a document, article, or book. It helps to organize content by breaking it into sections, making it easier for readers to navigate and understand the material. Subheadings often summarize the main idea of the section that follows, providing clarity and context. In academic writing, subheadings can enhance the structure of a paper, guiding readers through different arguments or topics. They are commonly used in various formats, including essays, reports, and online articles, to improve readability and highlight key points, such as research findings or case studies.