A question for shopify

I am using FB AD to introduce traffic for shopify.，and I would like to ask whether the product is more important or the way i use FB ad is more important?

Both. Plus your store. Plus your marketing skills.

Both are important. If the product satisfies the users and ads creates the brand awareness among the people, And your product will be placed in good position.

Everything is important. Shopify sites perform well when they are trusted by the people who are visiting them.

Ensure that your ads are clean and informative. Ensure your website is clean and not appearing spammy (i.e. no countdown timers). Ensure your product has a good description and price.

The only real way to know what works is by trial and error. There are 'best web practices' but these aren't 100% certain.

Ofcourse! both are important, Also your store need some reputations like buyers reviews, recent purchase charts, if u hav new store! Then only u can get some average sales