Ebook formats are digital file types used to store and display electronic books. The most common formats include EPUB, which is widely supported by various devices and apps, and PDF, known for preserving the original layout of printed pages. Other formats like MOBI and AZW are specific to Amazon Kindle devices, while FB2 and CBZ cater to niche audiences. Each format has its own advantages and limitations. For instance, EPUB allows for reflowable text, making it easier to read on different screen sizes, while PDF is ideal for documents that require precise formatting. Choosing the right format depends on the reader's device and preferences.