1 valid item with warnings detected from Google Search Console

Why am I getting 4 detected warnings from Google Search Console

-Missing field 'aggregateRating' (Optional)

-Missing field 'review' (Optional)

-Missing field 'brand' (Optional)

-No global identifier provided (e.g. gtin, mpn, isbn) (Optional)

Should I be concerned with this affecting my sea scoring on google as i noticed these are optional.

all advise is appreciated