See Similar buttons increase engagement and click-throughs from listing pages, SERP, and product recommendation carousels, by enabling real-time, in-moment, customer-led discovery of similar items.
Crucially, on OOS size variants we were able to filter next best item to customers, increasing session conversion rate proportionate to stockouts at that time.
*Revenue uplift depends on % OOS e.g. for fashion retailers, if you have 50% stockouts, this can double sales. If you have 20% stockouts this can increase sales +25%. 10% ~ +11%, etc.