✔Update Setsare the primary method formoving customizationsfrom one ServiceNow instance to another. An Update Set records changes made to an instance, including modifications to:

Forms, fields, and tables

Business rules, scripts, and workflows

UI policies and ACLs

How Update Sets Work:

When youmodify configurations, the changes arecapturedin an active Update Set.

The Update Set is thenexported from the development instanceandimported into the target instance(e.g.,from Dev to Test to Production).

Once imported, the Update Set iscommitted, applying the changes.

Option A (Table Templates)is incorrect because these definedefault field structuresfor tables but do not move customizations.

Option B (Application Files)is incorrect because individual application files exist within Update Sets but do not serve as a transport mechanism.

Option C (UI Script Includes)is incorrect because script includes are reusable scripts, not a method for transferring configurations.

????Reference:ServiceNow Administration – Update Sets & Instance Migration