brand attribute
Missing brand
Google uses brand with product identifiers to recognize an item. Missing or inconsistent values reduce data quality.
When the scanner can help
It can copy brand only when the ID matches exactly and one unambiguous source column already contains a value.
When not to auto-fix
Never infer a brand from the title, manufacturer or another product. For genuinely unbranded products, check Google’s applicable rules first.
Source: Google product data specification.