How to Set Up eCommerce Tracking in Google Analytics (GA4 Guide)

Most store owners know their total sales. Fewer know which pages, products, and campaigns create those sales. eCommerce tracking in Google Analytics 4 (GA4) closes that gap. It records product views, add-to-cart actions, checkouts, and purchases, then shows them in reports.

This guide covers three ways to set it up: custom gtag.js code, Google Tag Manager (GTM), and a plugin or app. It also shows how to read the GA4 ecommerce reports and fix common problems.

Quick answer: To set up eCommerce tracking in GA4, send ecommerce events such as view_item, add_to_cart, begin_checkout, and purchase to your GA4 property. Each event carries an items array with product details. You can send them with gtag.js, Google Tag Manager, or a plugin. Then confirm the events in DebugView and check the Monetization reports

What is eCommerce Tracking in Google Analytics?

eCommerce tracking sends shopping actions from your store to Google Analytics. Each action is an event. Each event includes details about the product, such as its ID, name, price, and quantity.

Google lists these events in its Measure ecommerce guide. The most common ones are:

• view_item: a visitor views a product page.
• add_to_cart: a visitor adds a product to the cart.
• begin_checkout: a visitor starts checkout.
• purchase: an order is completed.

With these events, GA4 can report revenue, purchasers, and product performance. Without them, your ecommerce reports stay empty.

GA4 Terms That Changed

Many older guides still use Universal Analytics terms. GA4 uses different names.

In GA4, the word “conversion” now mostly belongs to Google Ads. When you share a key event with Google Ads, it becomes a conversion there.

Why eCommerce Tracking is Important?

Online shopping keeps taking a bigger share of retail. The U.S. Census Bureau reports that U.S. retail eCommerce sales reached $340.2 billion in Q2 2026. That was 17.1% of total retail sales and 12.2% higher than Q2 2025. These figures are seasonally adjusted. They are not adjusted for price changes (U.S. Census Bureau, Quarterly Retail E-Commerce Sales).

For the full year 2025, the Census Bureau estimated eCommerce sales at $1,233.7 billion. That was up 5.4% from 2024 and 16.4% of total retail sales (U.S. Census Bureau).

More online sales also means more competition. Tracking shows you which products, pages, and channels turn visitors into buyers. Without it, you are guessing where to spend your time and ad budget.

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Benefits of Using Google Analytics for eCommerce Tracking

Implementing eCommerce tracking in Google Analytics offers many benefits for online businesses. Here are some key advantages:

1. See What Customers Do Before They Buy

GA4 shows how visitors move through your store. You can see which products they view, which they add to the cart, and where they leave.

2. Find the Channels That Bring Sales

You can compare email, social, search, and paid ads by purchases and revenue. This helps you move budget to the channels that actually earn money, not just clicks.

3. Learn Which Products Perform

The Ecommerce purchases report shows items viewed, added to cart, and purchased. A product with many views but few cart adds may have a price, image, or description problem.

4. Measure Conversion the GA4 Way

GA4 marks purchase as a key event by default (Google Analytics Help). You can then watch the session key event rate to see how many sessions end in a purchase.

5. Spot Cart and Checkout Drop-Off

The Purchase journey report and funnel explorations show where shoppers stop. If many users start checkout but few buy, check shipping costs, payment options, and form length.

6. Build Better Audiences

Purchase data lets you build audiences, such as cart abandoners or repeat buyers. You can use them for remarketing and for email or marketing strategies.

7. Connect Your Data to Other Google Tools

GA4 links to Google Ads and Search Console. This gives you a clearer view from search or ad click to final purchase.

Prerequisites for Setting Up eCommerce Tracking

Before you start, check these items:

• A GA4 property and web data stream. If you do not have one, follow our steps to create a Google Analytics 4 account. You will need the Measurement ID (it starts with G-).
• A store that can output product and order data. WooCommerce, Shopify, and custom stores all can, but the setup differs.
• The right access. You need Editor access or higher in GA4. You also need admin access to your site, and to GTM if you use it.
• Privacy consent. If you serve visitors in regions with consent rules, set up a consent banner before you collect data.

Which Setup Method Should You Choose?

If you run WooCommerce or Shopify and want the fastest route, start with a plugin or app. If you need custom events, use GTM or custom code.

Important: Use only one method for the same events. If a plugin and GTM both send purchase, GA4 will count orders twice.

Setting Up eCommerce Tracking Directly Adding JavaScript to Your Site

Method 1: Add eCommerce Tracking With gtag.js

This method puts JavaScript directly in your site. You will likely need a developer.

Step 1: Add the GA4 Tag to Your Site

In Google Analytics, go to Admin, open Data streams, and select your web stream.

Click View tag instructions and choose Install manually. Copy the gtag.js code and paste it into the <head> of every page.

Step 2: Send eCommerce Events

You’ll need to add JavaScript code for each specific eCommerce event directly on your site’s pages. The primary events include:

• view_item (when a product page is viewed)
• add_to_cart (when an item is added to the cart)
• begin_checkout (when the checkout process is started)
• purchase (when a purchase is completed)

Here is an example of how to implement each event:

view_item Event (Product Page View):

gtag('event', 'view_item', {
    currency: 'USD',
    value: 50.0,
    items: [{
        item_id: 'P12345',
        item_name: 'Product Name',
        price: 50.0,
        quantity: 1
    }]
});

add_to_cart Event:

gtag('event', 'add_to_cart', {
    currency: 'USD',
    value: 50.0,
    items: [{
        item_id: 'P12345',
        item_name: 'Product Name',
        price: 50.0,
        quantity: 1
    }]
});

begin_checkout Event:

gtag('event', 'begin_checkout', {
    currency: 'USD',
    value: 100.0,
    items: [{
        item_id: 'P12345',
        item_name: 'Product Name',
        price: 50.0,
        quantity: 2
    }]
});

purchase Event:

gtag('event', 'purchase', {
    transaction_id: 'T12345',
    currency: 'USD',
    value: 100.0,
    tax: 5.0,
    shipping: 10.0,
    items: [{
        item_id: 'P12345',
        item_name: 'Product Name',
        price: 50.0,
        quantity: 2
    }]
});

Send eCommerce Events

Add an event for each shopping action. Google documents each event and its parameters in the gtag.js ecommerce guide.

view_item (product page view):

gtag('event', 'view_item', {
  currency: 'USD',
  value: 50.0,
  items: [{
    item_id: 'P12345',
    item_name: 'Product Name',
    price: 50.0,
    quantity: 1
  }]
});

add_to_cart:

gtag('event', 'add_to_cart', {
  currency: 'USD',
  value: 50.0,
  items: [{
    item_id: 'P12345',
    item_name: 'Product Name',
    price: 50.0,
    quantity: 1
  }]
});

begin_checkout:

gtag('event', 'begin_checkout', {
  currency: 'USD',
  value: 100.0,
  items: [{
    item_id: 'P12345',
    item_name: 'Product Name',
    price: 50.0,
    quantity: 2
  }]
});

purchase:

gtag('event', 'purchase', {
  transaction_id: 'T12345',
  currency: 'USD',
  value: 100.0,
  tax: 5.0,
  shipping: 10.0,
  items: [{
    item_id: 'P12345',
    item_name: 'Product Name',
    price: 50.0,
    quantity: 2
  }]
});

Keep these rules in mind:

• Do not hard-code values. The sample values above are placeholders. Your store must fill in the real product, price, and order data.
• Always send currency with value. Google requires the currency whenever you send revenue data.
• Keep tax and shipping out of value. Send them in their own tax and shipping fields.
• Use a unique transaction_id. It helps stop the same order from being counted twice.
• Fire purchase once. Place it on the order confirmation page, and guard against page reloads.
• Track refunds. Use the refund event for full or partial refunds (Google Analytics Help).

Step 3: Verify Events in GA4

1. Open Realtime to see if events arrive.
2. For full detail, open Admin > DebugView. DebugView shows each event and its parameters, so you can confirm the items array is correct.
3. Place a test order and check that purchase shows the right value, currency, and items.

Standard reports can take up to 24 to 48 hours to fill in, so do not judge your setup from them on day one.

Method 2: Add eCommerce Tracking With Google Tag Manager (GTM)

Requirements: Google Tag Manager account, GA4 Property, a basic understanding of GTM.

GTM does not create ecommerce data on its own. Your site must first push product and order data into the data layer. GTM then reads that data and sends it to GA4. Google explains this in its GTM ecommerce guide.

Step 1: Add the Google Tag

1. Log in to your Google Tag Manager account.
2. Choose your container (the one associated with your site).
3. Go to Tags > New > Tag Configuration and select GA4 Configuration.
4. Enter your Measurement ID from GA4 (found in GA4 under Admin > Data Streams).
5. Set the trigger as All Pages to track general data across your site.
6. Save and publish the tag.

Step 2: Push eCommerce Data to the Data Layer

Your developer or ecommerce plugin must add code like this when each action happens. Clear the old ecommerce object first, then push the new event:

dataLayer.push({ ecommerce: null });  // Clear the previous ecommerce object.
dataLayer.push({
  event: 'add_to_cart',
  ecommerce: {
    currency: 'USD',
    value: 50.0,
    items: [{
      item_id: 'P12345',
      item_name: 'Product Name',
      price: 50.0,
      quantity: 1
    }]
  }
});

For the order confirmation page, push the purchase event with a transaction_id:

dataLayer.push({ ecommerce: null });
dataLayer.push({
  event: 'purchase',
  ecommerce: {
    transaction_id: 'T12345',
    currency: 'USD',
    value: 100.0,
    tax: 5.0,
    shipping: 10.0,
    items: [{
      item_id: 'P12345',
      item_name: 'Product Name',
      price: 50.0,
      quantity: 2
    }]
  }
});

Step 3: Create Data Layer Variables

In GTM, go to Variables > New > Data Layer Variable. Create one variable for each value you want to send:

• ecommerce.items (name it “Ecommerce Items”)
• ecommerce.value (name it “Ecommerce Value”)
• ecommerce.currency (name it “Ecommerce Currency”)
• ecommerce.transaction_id (name it “Ecommerce Transaction ID”)

Step 4: Create a Trigger for Each Event

Go to Triggers > New and choose Custom Event. Set the event name to match the data layer event, such as add_to_cart or purchase.

Step 5: Create a GA4 Event Tag for Each Event

1. Go to Tags > New and choose Google Analytics: GA4 Event.
2. Select your Google tag or Measurement ID.
3. Enter the event name exactly as GA4 expects it, such as purchase.
4. Add event parameters: items = {{Ecommerce Items}}, value = {{Ecommerce Value}}, currency = {{Ecommerce Currency}}. For purchase, also add transaction_id = {{Ecommerce Transaction ID}}.
5. Attach the matching Custom Event trigger.

Step 6: Test and Publish

1. Click Preview in GTM and walk through a test purchase. Confirm each tag fires once.
2. Check DebugView in GA4 to confirm each event and its items array.
3. Click Submit to publish the container.

Setting Up eCommerce Tracking Using Plugins or Third-Party Apps

For WordPress: Using the HT Easy GA4 Plugin

HT Easy GA4 connects WordPress to GA4 and works with WooCommerce. Here is the setup:

Install and activate the HT Easy GA4 plugin from the WordPress Plugin Directory.

Go to Settings > HT Easy GA4 in your WordPress dashboard.

Connect your account by signing in with Google, or enter your Measurement ID manually.

Turn on the eCommerce events you need and save your changes.

Place a test order and check the result in the plugin’s GA4 Inspector tool and in GA4 DebugView.

The plugin also shows key numbers, such as sessions and page views, inside your WordPress dashboard. If you are still setting up GA4 on WordPress, read our guide on how to install Google Analytics on WordPress.

Read More: How to Install Google Analytics on WordPress: A Step-By-Step Guide

For Shopify: Using the Analyzely GA4 App

Install the Analyzely GA4 app from the Shopify App Store. Activate the app in your store.

Sign in with Google to Connect Google Analytics in the Analyzely app effortlessly

Choose the eCommerce events you want to track in the app dashboard.

Click on the Finish Button to complete the setup.

The Analyzely app provides real-time and customizable reports to monitor store visitors and sales performance. You can track active users, popular events, visitor locations, device usage, and key metrics like sessions, page views, and bounce rates.

The app shows reports for visitors and sales, including total orders, AOV, conversion rates, and top-performing products. For a longer walkthrough, see how to add Google Analytics to Shopify.

Read More: How to Add Google Analytics to Shopify: Most Easy Way

How to Read eCommerce Reports in GA4

Once data flows in, use the Monetization reports. GA4 does not have the old “Product Performance” and “Sales Performance” reports from Universal Analytics. Here are the reports to use instead.

Monetization Overview

Go to Reports > Life cycle > Monetization > Monetization overview. By default, it shows these cards (Google Analytics Help):

• Total revenue: revenue from ecommerce, in-app purchases, subscriptions, and ads, minus refunds.
• Purchase revenue: revenue from ecommerce and in-app purchases.
• Total purchasers: users who made a purchase.
• First-time purchasers: users who bought for the first time.
• Average purchase revenue per user: average purchase revenue for each user.

Use it to watch trends and compare date ranges. Check it weekly for sudden drops or spikes.

Ecommerce Purchases

This report gives item-level data. It shows how many times each item was viewed, added to the cart, and purchased. Compare these numbers for each product:

• High views, low cart adds: check price, images, and product copy.
• High cart adds, low purchases: check shipping costs, payment options, and checkout steps.

GA4 builds this report from the items array, so poor item data gives poor results.

Purchase Journey

This report shows how shoppers move through the buying process. It needs the view_item, add_to_cart, begin_checkout, and purchase events to work. Use it to find the step where most shoppers drop off.

Key Events and Session Key Event Rate

GA4 no longer uses “conversion rate” for site events. It uses the session key event rate: the share of sessions with a key event, such as a purchase. Because purchase is a key event by default, you can compare this rate across channels to see which sources bring real buyers.

Common Problems and Fixes

• Ecommerce reports are empty. GA4 shows no ecommerce data until you send the events. Check DebugView to confirm the events arrive with an items array.
• Revenue shows as zero. The value or currency field may be missing or wrong. Send both on every revenue event.
• Orders are counted twice. Two tools may fire purchase, the confirmation page may reload, or transaction_id may be missing. Use one method and a unique ID.
• Realtime works, but reports are empty. Standard reports can take 24 to 48 hours. If items are still missing later, check your item parameters.
• Product names look wrong. The item_name values come from your store. Fix them at the source.

Frequently Asked Questions

Conclusion

eCommerce tracking turns raw traffic into clear answers: which products sell, where shoppers drop off, and which channels pay off. Choose one method, send clean events, and test with DebugView before you trust any report.

If you run WordPress, HT Easy GA4 is the quickest way to start. If you run Shopify, try the Analyzely GA4 app. Then use the Monetization reports to find your next improvement.