Headers are titles or headings used in documents, websites, and emails to organize content and make it easier to read. They help readers quickly identify the main topics or sections of the text. In web design, headers are often formatted using HTML tags like <h1> for the main title and <h2> for subheadings, which also helps search engines understand the structure of the content. In addition to improving readability, headers can enhance user experience by guiding readers through the material. They can also be styled with different fonts, sizes, and colors to make them stand out. Proper use of headers is essential for effective communication in both digital and print formats.