What is GeoJSON?
GeoJSON is a JSON-based vector format used to move geographic features between APIs, web maps, scripts, and lightweight desktop workflows.
GeoJSON stores geometry and attributes together in one text document, which makes it easy to inspect, diff, and exchange without special database tooling.
It became the default interchange format for many browser mapping stacks because developers can read it directly and feed it into JavaScript, REST APIs, and data pipelines with very little ceremony.