“So there are two aspects here, when it comes to duplicate content.
First of all, you don’t get a penalty for duplicate content.
So …even before you look into it too much, the only time we would have something like a penalty or an algorithmic action or manual action is when the whole website is purely duplicated content, …if it’s one website that is scraping other websites for example.
If these are ecommerce sites and you have the description that’s the same and the rest of your website is different, that’s perfectly fine.
You don’t need to worry about any demotion or dropping in ranking or anything.”