Hello Matthew, Ben here - your Shopify Guru!
You would want to run Facebook Ads that include the products listed in your Shop tab from your Facebook page.
You can run multi product ads this way and target buyers directly to your Facebook page.Facebook has some documentation for this here:
You can also look at running dynamic product ads with Facebook as well.
https://www.facebook.com/business/a/online-sales/dynamic-product-ads
I hope this helps! Feel free to reach out if you have any further questions :)
Cheers,
Ben C - Shopify Guru
Support@Shopify.com