Automatically send mails to your subscribers when Product Back In Stock - Supported Product Types are Simple,Variable,Grouped,Simple Subscription and …

Noted That:

To install correctly this back-in-stock-notifier-for-woocommerce.zip.
Fisrt Download the back-in-stock-notifier-for-woocommerce.zip to your computer
Extract/Open back-in-stock-notifier-for-woocommerce.zip to Your Computer.
Then, Find readme.txt file inside back-in-stock-notifier-for-woocommerce.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "back-in-stock-notifier-for-woocommerce.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "back-in-stock-notifier-for-woocommerce.zip" Downloaded plugin from your computer, Where you downloaded back-in-stock-notifier-for-woocommerce.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Back In Stock Notifier for WooCommerce | WooCommerce Waitlist Pro" folder is added on left sidemenu. Now, Click on "Back In Stock Notifier for WooCommerce | WooCommerce Waitlist Pro" folder.

Noted that: If you do not see "Back In Stock Notifier for WooCommerce | WooCommerce Waitlist Pro" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about Back In Stock Notifier for WooCommerce | WooCommerce Waitlist Pro Configurtions and Settings or How to work "Back In Stock Notifier for WooCommerce | WooCommerce Waitlist Pro" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "Back In Stock Notifier for WooCommerce | WooCommerce Waitlist Pro" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is Back In Stock Notifier for WooCommerce | WooCommerce Waitlist Pro
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide
Minimum Requirements PHP version 5.2.4 or greater (PHP 5.6 or greater is recommended) MySQL version 5.0 or greater (MySQL 5.6 or greater is recommended) WooCommerce 3.0 WordPress 4.7+ Automatic installation Automatic installation is the easiest option as WordPress handles the file transfers itself and you don’t need to leave your web browser. To do an automatic install of Back In Stock Notifier, log in to your WordPress dashboard, navigate to the Plugins menu and click Add New. In the search field type “Back In Stock Notifier” and click Search Plugins. Once you’ve found our plugin with author codewoogeek you can view details about it such as the point release, rating and description. Most importantly of course, you can install it by simply clicking “Install Now”. Manual installation The manual installation method involves downloading our plugin and uploading it to your webserver via your favourite FTP application. The WordPress codex contains instructions on how to do this here.

Guide

Minimum Requirements

PHP version 5.2.4 or greater (PHP 5.6 or greater is recommended)
MySQL version 5.0 or greater (MySQL 5.6 or greater is recommended)
WooCommerce 3.0
WordPress 4.7+

Automatic installation

Automatic installation is the easiest option as WordPress handles the file transfers itself and you don’t need to leave your web browser. To do an automatic install of Back In Stock Notifier, log in to your WordPress dashboard, navigate to the Plugins menu and click Add New.

In the search field type “Back In Stock Notifier” and click Search Plugins. Once you’ve found our plugin with author codewoogeek you can view details about it such as the point release, rating and description. Most importantly of course, you can install it by simply clicking “Install Now”.

Manual installation

The manual installation method involves downloading our plugin and uploading it to your webserver via your favourite FTP application. The WordPress codex contains instructions on how to do this here.

product, supported, types, simplevariablegroupedsimple, subscription, stock, back, mails, your, subscribers,

Name
How to add Extended Evaluation For Statify in Wordpress
How to add Mellat Woocommerce in Wordpress
How to add Wp Cycle in Wordpress
How to add Admin Management Xtended in Wordpress
How to add Audioigniter in Wordpress

Reffered: https://wordpress.org/