CSV files must contain coordinates (latitude and longitude) when uploading to Mapbox Studio.
If a row of data is invalid, then that row will not be included in the tileset.
The first line of your CSV file must have column headers, and at a minimum a header for latitude and longitude. Additional column headers that the CSV plugin will detect are: wkt, geom, geometry, geojson, and x/y. If a column has an empty header, a column label will automatically be generated.
Here’s an example of how to format a CSV file to upload in Mapbox Studio:
University at Albany,42.686744,-73.822852
The College of St. Rose,42.664351,-73.786562