What is the underlying mechanism behind empty slots in Ethereum?

Empty slot definition based on common meanings and most popular ways to define words related to empty slot

If you have no extension and you are sure that you will not need one in near future, there is no need to have a spare module in Slot 3 In

empty the bank slot If you have no extension and you are sure that you will not need one in near future, there is no need to have a spare module in Slot 3 In

empty the bank slot png empty · 1 containing nothing · 2 without inhabitants; vacant or unoccupied · 3 carrying no load, passengers, etc · 4 without purpose, substance, or value an