What is SO-DIMM Ram, and is it better or worse than DDR4

Unpopulated dimm slot on laptop motherboard what is sodimm slot ThinkPad E14 Gen 5, which I ordered recently , have memory slots as well It also has 2nd SSD slot what are the best slot machines to play in vegas SODIMM for laptop computers, each having various types and speeds A memory slot, memory socket, or RAM slot is what allows computer

what are slot wedges in a dc machine made of English: A slot for DDR SO-DIMMs on a mainboard Deutsch: Ein Slot für DDR SO-DIMMs (Small Outline Dual Inline Memory