This plugin was deprecated and replaced by 
GTM Ecommerce for WooCommerce.
Do you own 
WooCommerce shop and you want to track and analyze your customers' activites?
This plugin push standard Enhanced Ecommerce information to GTM Data Layer.
Once this information is available in your GTM workspace you can plug in and use any tool available. Even if you are unsure yet which tool you would need to use.
The most basics use cases are following:
- Measure ecommerce behaviors in Google Analytics
- Track conversions from Facebook and/or Instagram campaigns
- Track conversions from Google Ads campaigns
Without Enhanced Ecommerce GTM for WooCommerce plugin you would need a separate plugin for each of those integrations. And each additional plugin may make your Wordpress setup more complex.
With Enhance Ecommerce GTM for WooCommece just intall this plugin and then configure everything else in GTM.
If you are already using Google Analytics with GTM other plugins integrating WooCommerce directly with GA may cause duplicated tracking. Using DataLayer is a standard way to ensure your tracking information stays consistent.