Data policies are used to define rules that govern the creation, modification, and deletion of data in ServiceNow. These policies can be used to ensure data consistency by enforcing data quality standards and preventing invalid or inaccurate data from being imported.
References:
* ServiceNow Product Documentation: Data policies overview - https://docs.servicenow.com/bundle
/vancouver-platform-administration/page/administer/field-administration/concept/c_DataPolicy.html