Make sure your values are actually comma-seperated (Excel exports to CSV are semicolon-seperated by default).
Your data will be handled locally by your browser only and will not be uploaded to external services.
Name of the aggregate dimension that assigns a quantitative value to each row in your data.
label: displayed name of the hierarchical dimension
levels: a comma-seperated list of dimensions from your data. The position of each term in this list defines its level in the hierarchy.
Label must be set