Don't know how this works? Please refer to how to use Radar collections.
How this works?
The Alphanumeric string between /d/ and /edit in your sheet URLEg: https://docs.google.com/spreadsheets/d/[sheet ID]/edit#gid=0
By default, fetches data from the first sheet
Get the value from a cell or the total number of non-empty rows or columns from the range or post-process the data yourself. You will see N/A at first on Radar when you choose custom above.
A cell or Range. Eg: B4, A2:A, B2:2, C5:H7
How you want to name this data on Radar
How often Radar should refresh the data in the background