Convert Geojson file to text field

Please help a beginner cartographer.

The task is to create a map of areas suitable for growing grapes.
There is a Geojson file with all polygons and a table with attributes. For visualization, Kepler.gl requires a field with a text description of each polygon (see image).

Can you tell me how to add such a field to my table?

The issue names no repository file, test, or entry point. First clarify whether the request is for a Kepler.gl feature, a usage instruction, or a documentation update, and identify the table and GeoJSON inputs involved. Done should be defined as a reproducible way to provide polygon text fields for visualization.

Written by the indexing model from the issue text.