GeoJSON is a widely used open standard geospatial data interchange format that represents geographic features with their non-spatial attributes. It's based on JavaScript Object Notation (JSON), making it human-readable and easy to parse by machines. GeoJSON supports various geometry types, including Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, and GeometryCollection. These geometries can represent locations, routes, areas, and collections of these features. Each feature in a GeoJSON file is represented as a JSON object with a 'type' property (set to 'Feature'), a 'geometry' property containing the geometric representation, and a 'properties' property holding the non-spatial attributes as key-value pairs. GeoJSON is commonly used in web mapping applications, Geographic Information Systems (GIS), and data analysis tools for storing and exchanging geographic data. Its simplicity and widespread support make it a popular choice for representing spatial information on the web and in various geospatial workflows. It is often used for displaying data on interactive maps and for performing spatial analysis.