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is there a free and work addon for google product feed
Unfortunately, we have not heard about a free extension. But we can advise you to use GoMage Feed Pro extension for these purposes. Moreover, the last version 3.3 of Feed Pro extension has many advantages that make your configuration easier and faster.
The important thing is that if you buy the extension, you will get a year of free upgrades and you will be able to update the extension free of charge.