The Shoelace app, for example, offers an easy-to-follow setup guide with a built-in strategy to help you lead customers from the consideration phase to making a purchase.

Without installing a third-party app, you can also run Facebook dynamic retargeting ads through your Shopify store with Shopify Marketing.

Shopify Marketing will pull product images, titles, descriptions, and prices from your store and put together retargeting ads to reach your store visitors on Facebook and Instagram. This is one of the easiest and lowest-cost ways to launch your first retargeting campaign.

Cons 

With the simple setup interface provided by an app, you may also give up the ability to dive deeper into the results of all your retargeting campaigns and scale your best performing ads.