* A field service management (FSM) change task is a task that is created from a change request and assigned to a field service agent to perform work on a configuration item (CI) or an asset1.
* An asset task is a task that is created from an asset record and linked to an FSM change task to track the work done on the asset2.
* When an asset task is completed, the asset record associated to the task is automatically updated with the latest information, such as location, status, assignment group, assigned to, and so on2.
* This feature removes the need to manually update the asset record after completing the FSM change task, saving time and ensuring accuracy2.
References: 1: Create a change task for field service 2: Asset tasks

The Identification and Reconciliation process in ServiceNow ensures that configuration items (CIs) are correctly matched during the import process. This prevents duplication by validating unique identifiers, such as serial numbers or UUIDs, ensuring CMDB integrity.
Reference: CMDB Data Reconciliation Practices (ServiceNow CMDB guide).

An asset is a record that represents any tangible or intangible object that is tracked by the organization12.
There are different types of assets, depending on their nature, usage, and lifecycle12.
The types of assets are12:
Model: A model is a record that defines the common attributes and specifications of a group of assets, such as manufacturer, product, category, and device type12. For example, Dell Latitude E7450 is a model of a laptop.
Software entitlement: A software entitlement is a record that defines the rights and obligations of using a software product, such as license type, quantity, expiration date, and cost13. For example, Microsoft Office 365 is a software entitlement that grants access to various