This option can be used to complete the installation even when no boot loader is to be installed, either because the arch/subarch doesn't provide one, or because none is desired (e.g. you will use existing boot loader). If you plan to manually configure your bootloader, you should check the name of the installed kernel in /target/boot. You should also check that directory for the presence of an initrd; if one is present, you will probably have to instruct your bootloader to use it. Other information you will need are the disk and partition you selected for your / filesystem and, if you chose to install /boot on a separate partition, also your /boot filesystem.