Import data from Excel to SharePoint Online list
The Excel Import App enables you to import data from an Excel spreadsheet (in .xlsx, .xls, or .csv format) into an existing SharePoint Online list. If you have a large Excel file with multiple worksheets, you can also import specific sheets into the SharePoint Online list, one at a time.
What's more, the Excel Import App allows users to import data into most built-in SharePoint column types.
Capability of Column mapping
With the Column Mapping feature, you can efficiently configure how to import an Excel spreadsheet into a SharePoint Online list by mapping Excel columns to SharePoint list columns.
Furthermore, Column Mapping is automatically applied if the Excel spreadsheet and the SharePoint Online list have the same column names. Alternatively, you can manually perform column mapping.
Skip or Update Duplicate Records
The SharePoint Excel Import App gives you the option to skip or update duplicate records by specifying a Key column(s).
You can choose to skip duplicate records when you want to import only new records into the SharePoint Online list. Alternatively, you can choose to update duplicate records to ensure that existing list items are updated during the import.