Can I know the difference between data backfilling and refreshing, in the context of BigQuery Data Transfers.
Data Refresh window is a parameter that can be configured when setting up BigQuery Data Transfers for Google Ads and Search Ads 360 data (probably for some other BigQuery data transfers too).
Reference:
https://cloud.google.com/bigquery-transfer/docs/working-with-transfers#refreshing
https://cloud.google.com/bigquery-transfer/docs/adwords-transfer
-Data transfer:
After you configure a data transfer, the BigQuery Data Transfer Service automatically loads data into BigQuery on a regular basis.
I.e fetch data from last 24 hours to you BQ dataset.
-Backfills:
You can also initiate data backfills to recover from any outages or gaps.
I.e fetch data gaps, insert new lines that wasn't imported in the data transfer.
-Refresh: Overwrites a fresh copy of data in the destination table.
source:
Cloud Storage transfers | BigQuery Data Transfer Service | Google Cloud