Hi Emmanuel,
Would you please tell me a few good video tutorials or video course on how to connect my Shopify products to Google Shopping and Google Merchant Center. Much appreciated
Hello Kha44bar, thank you for your question in the FeedArmy AMA Event.
The easiest no brainer setup would be to use the Google and youtube app: https://apps.shopify.com/google
If you want more control, such as using rules, multiple currencies, multiple languages, multiple platform targeting and so on, I would recommend https://apps.shopify.com/multiple-google-shopping-feeds
This is what I use for all my clients. This has also an easy setup if you are not planning to make any modifications, but it does allow you to make some very advanced setups if you desire to do so.