The WooCommerce Group Buy & Deals extension is a versatile plugin to the WooCommerce plugin that brings group buying and deals features to your WordPress eCommerce platform. Here is a summary of its key features:

Group Buy Features:

• Creates a new product type in WooCommerce called "Groupbuy."
• Supports the latest versions of WordPress and WooCommerce.
• Seamless integration with WooCommerce via hooks.
• Works with various payment gateways supported by WooCommerce and TeraWallet/Credit payment gateways.
• Defines the number of participants required for a group buy (can be set to 1 or more).
• Buyers/users can purchase multiple deals.
• Ability to refund purchases if a deal fails (dependent on gateway support).
• Instantly finishes a group buy deal if the maximum number of deals is sold.
• Defines minimum and maximum available deals, as well as the maximum deals per user.
• Sets start and end times for group buy deals.
• Ability to manually relist group buy deals.
• Control over how deals are displayed, either with other items or on a separate page.
• Provides widgets for different deal types (ending soon, future, latest/recent, etc.).
• Email notifications for various deal statuses (win, fail, finish, etc.) with editable templates.
• Product labeling to indicate group buy status.
• User's "My deals" page to view active and purchased deals.
• Filtering options for group buy products in the product list (wp-admin).
• Compatibility with WPML for multilingual support.
• Allows users to create and submit their group buy/deals with fee charging capabilities for site owners (via multivendor plugins like Product Vendors or Dokan).
• Requires cron jobs; can use third-party services like easycron if the host does not support 1-minute cronjobs.
• Works with WooCommerce API.

This extension offers a wide range of functionality for creating and managing group buying opportunities in your WooCommerce store, providing flexibility for merchants and engaging deals for customers participating in group purchases.