Global columns are attributes that you can add to an import that will apply to every profile that is imported. You can add as many global columns as you'd like. These can be Crowdskout fields or they can be custom attributes.
Once you have mapped all of the columns in your file, you'll be prompted to "add a global column" as a final step before Crowdskout begins to inspect your data. If needed, click "Add a Global Column."
Once you are in the global column section select from the drop-down what field you would like the global column to be. Then, select the global column value from the right-hand side drop down menu.
Remember, there is no limit to how many global columns you can add to your import.