Enhanced Ecommerce (UA) helps you to use Enhanced Ecommerce using dataLayer (Google Tag Manager).

Key Features.
Supports main ecommerce activities:

Product Impressions
Product Clicks
Product Detail Impressions
Add / Remove from Cart
Add toWishlist
Add to Compare
Checkout
 1 - Review Cart
 2 - Billing Address
 3 - Shipping address
 4 - Shipping Method
 5 - Payment Method
 6 - Payment information
 7 - Confirm order
Purchases