Landing pagescan use which SSJS library?

In Salesforce Marketing Cloud, landing pages can use the Core Library and the Platform Library of Server-Side JavaScript (SSJS). The Core Library provides fundamental functions, while the Platform Library provides additional functionality to interact with Marketing Cloud-specific features.

Core Library: Provides basic SSJS functionality.

Platform Library: Extends SSJS functionality with additional methods specific to Marketing Cloud.

Salesforce SSJS Documentation