Blender minimal version : 2.8
Mac users warning : currently the addon does not work on Mac with Blender 2.80 to 2.82. Please do not report the issue here, it's already solved with Blender 2.83. Check the bug report.
GIS datafile import : Import in Blender most commons GIS data format : Shapefile vector, raster image, geotiff DEM, OpenStreetMap xml.
There are a lot of possibilities to create a 3D terrain from geographic data with BlenderGIS, check the Flowchart to have an overview.
Exemple : import vector contour lines, create faces by triangulation and put a topographic raster texture.
Grab geodata directly from the web : display dynamics web maps inside Blender 3d view, requests for OpenStreetMap data (buildings, roads ...), get true elevation data from the NASA SRTM mission.
And more : Manage georeferencing informations of a scene, compute a terrain mesh by Delaunay triangulation, drop objects on a terrain mesh, make terrain analysis using shader nodes, setup new cameras from geotagged photos, setup a camera to render with Blender a new georeferenced raster.