Text based fields have the functionality to select which records to update*, update values based on conditions, adjust text casing and create Data Transformations.
In addition, there are other options available for the Zip Code field as well as Phone Numbers to enable users to maintain formatting based upon their location. These are as follows:
US Zip Codes
CA Postal Codes
UK Postal Codes
Phone Numbers
*These will be grayed out for fields such as the Constituent ID and the Constituent Import ID so that users cannot mistakenly update an existing record.