Some apps have a field to track labels and/or tags on your data. However some apps do not have these fields.
If your destination app does not have it and you would like to migrate tags and labels you can do so with mapping to a custom field.
To do so, create a custom field in your destination on the same record type as the tags/labels are tracked in your source (contacts, for example). Once added, please return to your Import2 migration page and add the mapping in the settings of the import. Then, rerun your sample migration to validate the results.