Please note: the product feed standard for Google regulates the presence of special feed elements and prevents the use of elements with empty values. According to these requirements, if there are empty properties in markup, they will be treated as follows:
Required elements:
Name property (product name) - the product item will be ignored.
Price property (product price) - the product item will be ignored.
Image property (product image) - the product item will be ignored.
Description property (product description) - replaced by the value of the name (product name) item.