Previously you could just import Product weight in “Variant Grams”.
Now there is a column “Variant Weight” where you can set any value in the units as you specify in the “Variant Weight Unit“.
For example – you can import precisely 1 lb, and no need to convert to grams, and no need to struggle with rounding problems.
You can still import the “Variant Grams” if you need to – then your Variant Weight column needs to be empty or non-existing.
Variant Grams are not exported anymore – only Variant Weight column is exported.