Disk Utility is a built-in application on macOS that allows users to manage and repair disk drives, partitions, and file systems. It can be used to check the health of a disk, format a disk, partition a disk, and repair disk errors.
Checking Disk Utility is important because it can help to identify and resolve potential problems with your disk drives. For example, Disk Utility can check for bad sectors on a disk, which can cause data loss. It can also check for file system errors, which can prevent you from accessing your files. By regularly checking Disk Utility, you can help to keep your disk drives healthy and prevent data loss.