Are you running ads? (Google, Facebook, Instagram..) Maybe you are not driving the right target to your website, so that is why you are not getting conversions.
If you are running Google Adwords, or you are interested on running Google Adwords, you should check our our free app! We will create and run your campaigns, create customized banners with your products, Remarketing campaigns... All this for free!
Check out our free app!: https://apps.shopify.com/cleverppc
If you have any question, do not hesitate and contact me :D
Marketing Department of Clever Ecommerce.