Reflowable eBook means that you can change the font, resize the text or alter the size of your display and the text will reflow itself to fit the available area.
Reflowable eBooks (ePub 2.0 version) can be viewed in iPad, Kindle, ADE, Nook, Kobo and Sony devices. An embedded audio and video also supported in Reflowable ePub 3.0 format.
Standard eBooks (ePub and .mobi) feature a dynamic (flowable) layout for text and images. This means that your eBook will look different when viewed on different eReaders.