AZW is a file format used primarily for eBooks, specifically those created for the Amazon Kindle devices. It is a proprietary format developed by Amazon that allows for features like digital rights management (DRM) to protect copyrighted content. AZW files can include text, images, and other multimedia elements, making them suitable for a variety of reading materials. The AZW format is based on the Mobipocket format, which means it can support complex layouts and interactive content. Users can read AZW files on Kindle devices and apps, providing a seamless experience for accessing a vast library of eBooks available through the Amazon Kindle Store.