If I had a free year of premium Wix Ecommerce, here is a list of things I would do to get the most out of it:
Take advantage of the free website and design it from scratch. With Wix, you have the flexibility to make your website unique and attractive, so I would create a website that could help promote my products in the best way possible.
Utilize the marketing tools and analyze the data provided by them to assess how my advertising is performing and improve it further if necessary. With Wix's Advanced Features, I could go beyond the basics and better target my audience using advanced tools, like remarketing and other tailored solutions.
Use all of the Wix Ecommerce features, like product options, shipping integrations, and inventory control. This would make managing my store much easier and keep my inventory in check.
Set up an abandoned cart recovery system to capture any customers who have added items to their cart but have not yet checked out and nurture them back to complete their purchase.
Take advantage of the promotions and discounts feature. Having the ability to offer customized discounts and promotions for my customers would help me gain and retain their loyalty.
Make use of the subscription feature to retain customers and get them to purchase frequently.
Tap into the Wix App Market to extend the functionality of my store, such as adding user reviews, setting up loyalty programs, etc.
Above all, I would make sure to keep my customers in mind while optimizing the store, as they are the key to a successful ecommerce business.