Disk Utility is a built-in application on macOS that helps users manage their computer's storage devices. It allows you to format, partition, and repair hard drives, solid-state drives, and external storage devices. With Disk Utility, you can also create disk images and verify the health of your drives. Using Disk Utility is straightforward; you can select a drive from the sidebar and choose the desired action, such as erasing or partitioning. This tool is essential for maintaining the performance and organization of your storage, ensuring that your data remains safe and accessible.