WooCommerce Waiting List module can build up a waiting list of people wanting the unavailable item, then notify these customers automatically when products come back in stock. You’ll see your sales and your customers’ satisfaction increase.

Admin will be able to plan a pre-launch for some products and create a mailing list of users before making them available for sale. Admin will have the possibility to create a list of potential customers interested in one or more products of your e-commerce.