You may have noticed your Google Sheets data is brought into Visible as a number with no unit. To change the unit, you will need to start in the "Data" section as shown below:
From here, all of the metrics you currently have in Visible will be displayed . Navigate to the metric you would like to edit. Click the "Settings" text to the right of the metric as shown above:
Next, the Settings for the specific will be displayed as shown below. From here, you will be able to change the unit. Click "Save", and you're good to go!