Geometry Scripting is an Unreal Engine plugin containing a set of Function Libraries that generate and edit mesh geometry via Blueprints and Python. You can use Geometry Scripting in Editor Utility Widgets and Asset Actions to create custom mesh analysis, processing, and editing tools. You can also use it in Actor Blueprints to create procedural objects and implement complex geometric queries.
These documents are designed to get you started and acquainted with Geometry Scripting.