Notify your customers when products are restocked.
Send an automatic message once out of stock product is available again
Track down the number of subscribers for each out of stock product (works with variations too!).
Create your own template for email notifications.
Send emails to subscribers when the product is back in stock. Allow your customers to subscribe to back in stock alert for specific products and variations. As soon as a product is restocked, then will notify subscribers by email automatically. They will be able to go back to your store and complete their purchase with ease.