Can Google Analytics Track Multiple Websites?

One of the first questions people ask when getting serious about analytics is whether they can track all of their digital properties in one place. The good news is that yes, Google Analytics is designed to handle multiple websites, and it gives you a couple of flexible ways to set it up depending on your business goals.

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This tutorial will walk you through the primary methods for tracking more than one website in Google Analytics. We'll cover how to set up cross-domain tracking for related sites and how to use separate properties to keep unrelated sites apart so you can choose the approach that makes sense for you.

First, Understanding the Google Analytics Structure

Before diving into the setup, it’s helpful to understand the hierarchy Google Analytics uses to organize everything. It’s pretty simple and consists of three main levels, but knowing what they are makes the whole process much clearer.

• Account: This is the highest level, representing your company or organization. A single Google account can manage multiple Analytics accounts. You'll typically have one Account that contains all your digital properties.
• Property: A Property represents a single website or app. Each property gets its own unique Measurement ID (which looks like G-XXXXXXXXXX). This is where Google Analytics collects and processes the data for that specific website. You can have multiple properties within one Account.
• Data Stream: Inside a Property, you have Data Streams. For websites, you'll have a "Web" data stream. This is the specific source collecting the data that flows into your property. It’s here you grab your Google Tag (gtag.js) tracking code and configure settings specific to your website.

With this structure in mind, let's explore the two ways to manage multiple websites.

Method 1: Track Related Websites with Cross-Domain Tracking

Cross-domain tracking lets you see data from two or more related sites as if they were a single site. It works by having one GA4 Property collect data from multiple domains. This is the best choice when you want to follow a user's journey as they move between your different websites.

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When should you use this method?

This approach is perfect for when your websites are part of a unified user experience. Imagine your customer journey is fragmented across different domains. Here are some common examples:

• Main Site and a Blog: Your main marketing website is www.coolcompany.com, but your blog is hosted on a subdomain or separate domain like blog.coolcompany.com or coolcompanyblog.net.
• E-commerce Website and Shopping Cart: Your storefront lives at www.mystore.com, but when a user checks out, they are redirected to a third-party cart like checkout.shopify.com.
• Registration or Event Portals: You have a main site at www.annualconference.com but use a tool on a different domain like tickets.eventbrite.com to handle sign-ups.

In all these cases, you want to see that the person who clicked an ad on your main site is the same person who checked out on the Shopify domain. Without cross-domain tracking, Google Analytics would treat them as two separate visitors, ruining your attribution and data accuracy.

The benefit: You get a single, consolidated view of your data, making it easy to track how users navigate your entire online ecosystem and which channels truly drive valuable actions, regardless of which domain they happen on.

How to Set Up Cross-Domain Tracking in GA4

Setting this up in Google Analytics 4 is much simpler than it was in older versions. Here’s a step-by-step guide.

Step 1: Get the Same Google Tag on All Your Websites The most important rule of cross-domain tracking is that every single page on all of the involved websites must use the exact same Google Tag (the gtag.js script) and the same Measurement ID (e.g., G-12345ABCDE). If you haven’t installed the tag yet, find it in GA by navigating to:

Admin → Your Property → Data Streams → click on your web stream → View tag instructions.

Copy this tag and install it in the <head> section of all your websites. Do not create separate properties for each site in this scenario. They will all share one property.

Step 2: Configure Your Domains in GA4 Next, you need to tell Google Analytics which domains to treat as part of the same user journey.

1. Navigate to the Admin section of your Google Analytics dashboard (the gear icon on the bottom left).
2. Make sure you've selected the correct Account and Property.
3. Under the Property column, click on Data Streams.
4. Click on the web data stream your site is using.
5. Under the Events tab, scroll down and click Configure tag settings.
6. On the settings screen, under the Settings section, click on Configure your domains.
7. Click the Add domain button and enter your first domain (e.g., yourcompanydomain.com).
8. Click Add condition again and enter your second domain (e.g., shopify.yourcompanydomain.com).
9. Continue adding all the domains you want included in the cross-domain setup. Finally, click Save.

That’s all there is to it. GA will now automatically handle passing a client ID parameter between the domains so that users and sessions are not broken as people navigate between them.

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Method 2: Track Unrelated Websites with Separate Properties

The second method is ideal for managing multiple websites that are not related to each other. In this scenario, you don't want their data to mix together because they are completely separate businesses or projects.

When should you use this method?

Think of this approach as the digital equivalent of keeping the books of two separate businesses in separate accounting software. Some examples include:

• You run a marketing agency servicing different clients, and you want to keep each client's data in its own, isolated environment.
• You have several personal websites that cater to completely different audiences, like one about gardening and one about gaming.
• You run e-commerce stores and want separate reports for each project.

The benefit is that it keeps everything neat and tidy, as each site has its own data, reporting settings, and permissions, so there's no risk of confusing traffic sources or sessions across unrelated businesses.

How to Set Up Separate Properties in GA4

This process is very straightforward. You're essentially creating brand new, separate entries in your Google Analytics account for each website.

1. Navigate to the Admin section in your Google Analytics dashboard.
2. In the Property column, click the + Create Property button.
3. Follow the on-screen setup wizard. Enter the name of the new property (e.g., "My New Blog"), select the time zone, and currency you're currently using. GA will generate a new Measurement ID and you're ready for the next step.
4. Install the new gtag.js tag in the <head> section of your new website. Do not reuse the tag from your first site.

That’s it! Now you have two separate properties in your Analytics account, each with its own unique tracking ID and data set. You can switch between them by using the property selector in the Admin section.

Comparing the Methods: Which is Right for You?

Choosing the right approach comes down to whether your websites are related and what you want to get out of your reporting.

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Use Cross-Domain Tracking If:

• Websites are closely related and share a common user journey.
• You want a unified view of all your traffic and conversion data together.
• You need to track users as they move between domains as part of a single visit.

Use Separate Properties If:

• Websites are unrelated and serve completely different audiences or goals.
• You want to keep each site’s data and reporting completely isolated from each other.
• You want to avoid any risk of overlapping traffic or user activity between the sites.

Final Thoughts

To wrap up, Google Analytics is perfectly equipped to handle tracking multiple websites, whether you need to consolidate data from related sites with cross-domain tracking or keep data completely separate for unrelated domains. With your data centralized in a Google Analytics account, asking long-term questions about what works in marketing and user behavior is more insightful. With Graphed, we've made this even easier. You can connect all your Google Analytics properties, ad platforms, and CRM data in one place. Instead of spending time in GA’s interface, you can build dashboards and get insights instantly — just by asking questions in clear, plain language. This means less time trying to figure out settings and more time acting on the insights that drive growth.

Once your data is consolidated in a central place, asking deeper, big-picture questions about your whole business — not just a single website — becomes much easier. At Graphed, we’ve simplified this process by allowing you to connect all your Google Analytics properties, ad platforms, and CRM data in one place. Instead of spending time in GA’s interface, you can build dashboards and get insights instantly — just by asking questions in clear, plain language. This means less time trying to figure out settings and more time acting on the insights that drive growth.