EPUB
EPUB (Electronic Publication) is an open, XML-based e-book file format standard maintained by the World Wide Web Consortium (W3C). It is designed for reflowable content, allowing text to adapt to different screen sizes and orientations, and supports features like embedded fonts, images, and metadata. EPUB is widely used for digital books, magazines, and other publications across various e-readers and devices.
Developers should learn EPUB when working on e-book publishing, digital content distribution, or applications that handle reflowable documents, as it is the industry standard for e-books and supported by most e-readers like Apple Books, Kobo, and Google Play Books. It is essential for creating accessible, cross-platform digital publications that require flexible layout and rich media integration, such as educational materials or interactive magazines.