What is AB partition and How to flash roms in it

What is AB partition and How to flash roms in it twrp slot a slot b I'm working with Android 9 Pie and I have one slot rooted and the other is not My reasoning to have my phone this way is dovetail slot blank Dynamic Partition Super Partiton AB Slots TWRP

monster slot c4 slot without manual flashing Suitable for some special scenarios; for b, --boot BOOT> boot image path, if not specified, will try to find the