Certification Aid wants to import data from a CSV file into a Data Extension.

The "Overwrite" import operation is used when you want to completely replace the contents of a Data Extension with the contents of the import file. This operation adds new records from the file and removes any records that are not present in the file.

Overwrite Operation: This will ensure that the Data Extension contains only the records present in the CSV file. Any existing records in the Data Extension that are not in the file will be deleted.