Send an email when a product someone looked at comes back in stock. Great news! Your products are being bought so quickly that you haven’t been able to restock. Bad news! A customer getting an “out of stock” notification when they try to buy your product might look elsewhere. Obviously you don’t want a customer looking elsewhere for your product, so making sure that they know when it’s available is crucial. MarketingSherpa’s case study showed a 22.45% conversion rate via Back in Stock emails.