A megabyte (MB) is a unit of digital information storage that is commonly used to measure file sizes. One megabyte is equivalent to 1,024 kilobytes (KB) or about one million bytes. It is often used to describe the size of documents, images, and other types of files on computers and mobile devices. In practical terms, a megabyte can hold a small image, a short audio clip, or a few pages of text. Understanding megabytes helps users manage their storage space and data usage, especially when downloading files or using applications on the internet.