Hi Jerry
Our plugin inserts the remarketing pixel on every page and sends additional events on product pages, add to cart events, the cart and the purchase confirmation page (as specified by Google).
If dynamic data collection has been enabled in your Google Ads account (https://take.ms/sWLQI), then the following four audiences will be filled with cookies: https://take.ms/y7Bl9
Those are the audiences the you can use for dynamic remarketing.
Since the plugin inserts the remarketing pixel on every page you can also create additional audiences using rules. Eg. every page the contains “product” in the URL: https://take.ms/2EQrBF
1.WooCommerce Google Product Feed plugin or something similar to upload the products to the Google Merchant Center
We added manually our products to Google Merchant Center. Do you recommend this?
It depends. If you have just a few products that only rarely change, then you can do this. But generally I would always recommend using a plugin that automatically generates a current product feed which is uploaded daily to the GMC. (Eg. WooCommerce Google Product Feed)
2. Google Merchant Center Account with all products uploaded
Does the data collection only works with the product that are uploaded?
The data will be collected for all products. But, they only will match against the products that are uploaded in the GMC and share the same ID. So you will need to make sure that the id is exactly the same. By default feeds are generated with the WordPress post id, which is the recommended value.
3. Google Ads account with a configured remarketing tag
What do you mean with this? Could you explain it a bit more?
I did in the first paragraph of my answer to you.
Hope this helps.
Regards
Aleks