What is the meaning of "UBOOT_TARGET-MAP=" in Armbian?

hi, What is the meaning of “UBOOT_TARGET-MAP=” in Armbian? What does it do? Can you explain?

help,help…

Perhaps try to ask at wonderful Armbian forums https://forum.armbian.com/ Or seek comments in GitHub - armbian/build: Armbian Linux build framework generates custom Debian or Ubuntu image for x86, aarch64, riscv64 & armhf or https://docs.armbian.com/ All those places are a lot more suitable then this forum.

hi, Can you directly burn your Armbian firmware using the rk burning tool?