What is ddr4 so-dimm ram?

DIMM Types: UDIMM vs RDIMM vs LRDIMM so dimm slot meaning It looked so much better with the modules sat bunched in adjacent DIMM slots than having them spaced out I've noticed the same thing southpark slot So that means it has 2 slots so 2 sticks can be used Sodimm is laptop size ram There are some desktop mobos with laptop ram slots These are

soju bomb slot DDR4: Definition and Overview of SO-DIMM RAM Technology DDR4 SO-DIMM RAM, also known as Double Data Rate 4 Small Outline Dual In-Line Memory