Rdy to start investing in fb ads.. but which product to choose? :o

[bumbastic]

Hi all,

I started on shopify beginning of december and as of a week my webshop is 100% operational and I am ready to start some fb like campagne/get started with the ads.

I have a collection that I would like to push
https://bumbastic.be/collections/topdeals
but I am not sure how.

1. Should I focus on 1 product from the start and then see how the market responds, continue or discard? (if yes how to choose that product :/)

2.Should I run ads for all the products and then see what product is most popular and refocus the budget on that specific product?

3. Should i just promote the collection without specific focus on a product and then verify which product gets most attention?

Need help, thanks in advance!