How can I create tags or collections to syncronice with Merchant Center?
Hello Antonio, thank you for your question and welcome to the Shopify AMA, I’m your host, Emmanuel from FeedArmy.
If you are using the google and youtube app, then you need to map them manually in the product editor within the google and youtube app.
Not a great solution.
But if you use the multifeed app, you can automatically map them to whichever attribute you want to map them, I assume custom labels, so that you can create custom campaigns.
Here is the multifeed app I use for all my clients: https://apps.shopify.com/multiple-google-shopping-feeds
I recommend that you use the attribute custom_label there are 5 in total such as custom_label_0 custom_label_1 etc…
More info: https://support.google.com/merchants/answer/6324473
Hope it helps.