ePub is a popular digital file format designed for eBooks and other types of digital publications. It allows for flexible text display, meaning that the content can adjust to fit different screen sizes, making it ideal for reading on devices like eReaders, tablets, and smartphones. This format supports various multimedia elements, such as images and audio, enhancing the reading experience. One of the key features of ePub is its ability to be reflowable, which means that the text can be resized and reformatted without losing its structure. This makes it accessible for readers with different preferences and needs. Many online bookstores and libraries offer ePub files, making it easy for users to find and enjoy a wide range of digital literature.