A Global List is an account-wide list that can be used in any form. A Global List is a legacy feature and is the predecessor to the Lookup List. Global Lists are predefined into four columns: Name, Value, FilterKey, Score.
Name:
The assigned unique text will display for a user in App.
Value:
Value when shown in reporting.
FilterKey:
Custom text for the internal index
Score:
Unique numerical assignment commonly used to carry out calculations
Note that your created list can only be in .csv or .xlsx formats.