Ecommerce tracking in Google Analytics allows you to measure transactions and revenue from your website. The first step is enabling ecommerce tracking in Analytics. You then add the ecommerce tracking code to your site, which involves sending transaction data like the ID, revenue, and shipping when a purchase occurs, as well as item data for each item purchased like the ID, name, price, and quantity. Proper implementation also involves loading the ecommerce plugin and sending the data.

1. UNDERSTANDING ECOMMERCE
TRACKING
INTERNAL: Google Confidential and Proprietary

2. Understanding Ecommerce Tracking
Ecommerce tracking allows you to measure the number of transactions and
revenue that your website generates.

3. Understanding Ecommerce Tracking
First step is enabling ecommerce tracking from within Google Analytics.

4. Understanding Ecommerce Tracking
Enable Ecommerce Tracking
1. Click Admin from the menu bar at the top of any screen in
Analytics.
2. Use the drop down menus to select the Account, Property, and
View.
3. Click View Settings.
4. In the Ecommerce Settings section, click the toggle so it says ON

5. Understanding Ecommerce Tracking
Enable Ecommerce Tracking
Ecommerce
Tracking
Code!

6. Understanding Ecommerce Tracking
Ecommerce Tracking Code: There are two types of ecommerce data you can send
using analytics.js: transaction and item data.

7. Understanding Ecommerce Tracking
Ecommerce Tracking Code: Transaction Data
Value Type Required Description
ID String Yes The transaction ID. (e.g. 1234)
Affiliation String No The store or affiliation from which
this transaction occurred (e.g.
Acme Clothing).
Revenue Currency No Specifies the total revenue or
grand total associated with the
transaction (e.g. 11.99). This value
may include shipping, tax costs, or
other adjustments to total revenue
that you want to include as part of
your revenue calculations.
Shipping Currency No Specifies the total shipping cost of
the transaction. (e.g. 5)
Tax Currency No Specifies the total tax of the
transaction. (e.g. 1.29)

8. Understanding Ecommerce Tracking
Ecommerce Tracking Code: Item Data
Value Type Required Description
ID Number Yes The transaction ID. This ID is what
links items to the transactions to
which they belong. (e.g. 1234)
Name String Yes The item name. (e.g. Fluffy Pink
Bunnies)
SKU String No Specifies the SKU or item code. (e.g.
SKU47)
Category String No The category to which the item
belongs (e.g. Party Toys)
Price Currency No The individual, unit, price for each
item. (e.g. 11.99)
Quantity Number No The number of units purchased in the
transaction. If a non-integer value is
passed into this field (e.g. 1.5), it will
be rounded to the closest integer
value.

9. Understanding Ecommerce Tracking
Ecommerce Tracking Code: IMPLEMENTATION
Load the ecommerce plugin
Adding a Transaction
Adding Items
Sending Data

10. Understanding Ecommerce Tracking
Ecommerce Tracking Code

11. Read More
https://developers.google.com/analytics/devguides/collection/analyticsjs/ecommerce