For more details see the Out of Stock Notification for Magento 2 extension page.
The module allows your customers to subscribe and receive notifications on price and inventory updates. And let you have more information on subscribers preferences and demands.
To configure the extension settings, go to Stores →Configuration →Out of Stock Notifications.
Use Configurable Image - When subscription, display the image of the configurable product instead of simple on the account page.
Greeting Text for Email - Specify greeting text for out of stock notifications.
Minimum Stock Quantity - If the option is disabled, the notification will be sent once the product status is changed to In Stock. You can also set the option to Yes and specify the minimum stock quantity that will trigger notification sending.
To send a test notification:
Allow Subscription for Selected Group(s) - Select one or several customer groups that will receive stock availability notifications.
Limit Emails by Product Qty - Enable the feature in case you want to align the number of emails to the back-in-stock items quantity. For instance, you have 30 subscribers for the particular product and only 5 items back to stock. With the feature enabled, only 5 first subscribers will receive the notifications.
Enable Subscribe from Category Page - Set to Yes to add a subscription link to the out-of-stock products on the catalog pages.
Use Popup for Guest on Category Page - Enable feature to activate a subscription pop-up for guests. After customers click a subscription link, the module displays a pop-up to input emails.
Allow Subscription for Selected Group(s) - You can manage price subscription for any groups of customers the same way as stock subscription.
To see the list of stock alerts subscriptions, go to Reports → Notifications → Out of Stock Notifications
To see the list of price alerts subscriptions, go to Reports → Notifications → Price Notifications
To see all existing subscriptions, please, go to Reports → Out of Stock Subscriptions.
You can use mass-action to delete selected subscriptions or adjust the required one using the Edit button. Please, click the Add New Subscription button to create a new one.
Admin Email Address - Input an email address, the extension will send notifications to.
Send Email Reports for New Subscriptions (Daily) - The daily email will include all the out-of-stock products, that have been recently subscribed to.
Email Template to Notify Admin - Select the appropriate template for the email notifications.
Notify Admin about Inventory Low in Stock - The feature sends the email notifications, basing on the specified value, which warns admin about low stock.
You can see the list of subscribers for a particular product. For this, go to Admin Panel → Products → Catalog. Then open the page of the product you are interested in and go to Product Alerts tab.
Export list of subscriptions in CSV and delete the subscriptions that are not relevant anymore.