One megabyte (1 MB) is a unit of digital information storage that equals 1,024 kilobytes. It is commonly used to measure the size of files, such as documents, images, and audio. For example, a typical high-quality photograph might be around 2 to 5 MB in size, depending on its resolution and format. In the context of computer memory, 1 MB can also refer to the amount of data that can be processed or stored in a computer's RAM or hard drive. Understanding file sizes in megabytes helps users manage their storage and bandwidth effectively, especially when downloading or uploading files online.