The primary informative feature of the EPUB format is its . Unlike fixed formats like PDF, EPUB allows text to automatically adjust its layout to fit various screen sizes, orientations, and user-selected font settings. Key Informative Features of EPUB

: Readers can customize their experience by changing font styles, sizes, and line spacing without breaking the document's structure.

: Every EPUB contains a dedicated package document (OPF file) that stores essential information such as the title, author, language, and publisher, which facilitates efficient library management and searchability.