3. VERIFY SPREADSHEET DATA IS FORMATTED CORRECTLY
Make sure your spreadsheet is using the correct format by checking your headers. You need to have at least one column with address-type information (Address, City, State, Postal Code, Country, or Lat/Long Coordinates). If you use lat/long coordinates, they need to be separated into different columns. You aren’t limited to the number of columns you can upload, so include all the info that you’ll need to see.
If Headers are not identical between the new and old dataset, any customized styling (i.e. custom colors, segments, pin shapes, etc.) applied in your map with the old dataset will be lost. To ensure that styling remains uniform through the transition, ensure that the new dataset has the same number of columns, in the same order, with the same spellings as the prior dataset.