What do storage slot specs mean?

I usually try to run a lot of hybrid decks that focus on creatures and control I find my meta lacks a lot of kill and counter spells so I do

42 inherited property Organization of This Specification +5 Notational Slots; Invariants of the Essential Internal Methods; Well

metalen kist met slot Slot metaclasses are similar to metaclasses, except that they determine the properties of slots instead of classes

meta slot 88 Attempt to detect an SD card in the slot sdcard SDSUPPORT M22 - Release SD M42