3 A/B tests detected on zennioptical.com in the last 90 days.
A shopper reviewing their items sees a newly added banner highlighting that free standard shipping is available on orders over $89, complete with a link to the terms.
A shopper viewing a product page sees a new similar products carousel placed prominently above the main product image gallery and purchase options. This allows them to easily browse alternative styles without needing to scroll down.
A shopper browsing a category page clicks on a product they are interested in. Instead of replacing the current page, the product page now opens in a new browser tab, allowing them to keep their place in the original list.