If your company run several websites, sub-domains and/or mobile apps to promote various brands/regional business units and you want to understand the overall performance of your company and also compare the performance of individual brands/ business units to each other then you need to set up rollup reporting in your Google Analytics account.

Rollup reporting is simply the reporting of data in an aggregated form from multiple digital properties (websites, mobile apps).

For example, if you have set up separate websites for each country (abc.com, abc.co.uk, abc.com.au, abc.in, etc) then through rollup reporting you can aggregate all of your website’s data in one view and see aggregated global performance metrics and/or compare the performance of various country-specific websites to each other.

Rollup reporting helps you in understanding the overall performance of all of your company’s websites and/or mobile apps.

Through roll up reporting, you can see total unique visitor reach of all of your websites and/ or apps.

In other words, you can determine the total number of unique people you are reaching through your websites, apps and/or marketing campaigns.

There are two ways of setting up roll up reporting in Google Analytics:

1. By using multiple trackers on each page of your website. Let us call this method ‘Standard roll up reporting‘ for easy reference.
2. By using Google Analytics Premium. Let us call this method ‘Premium roll up reporting‘ for easy reference.

In this article, I will explain both of these methods in great detail as well as outline their pros and cons.

Structure of a Google Analytics Account

In order to implement roll up reporting, you must know how a Google Analytics account is structured:

Unless you are a marketing consultant or an agency, you are most likely to have only one Google Analytics account and one property.

If you have got multiple Google Analytics account then each account is usually meant for one company/client.

A GA account can contain one or more properties.

A property (also known as digital property) can be a website or a mobile application.

We usually create one property per website/app. But in the case of roll up reporting, we may need to create multiple properties for a single website. Each property is identified by a unique ID known as property ID. A property Id is in the format: UA-12345-21.

A property can contain one or more views (also known as profiles).

A view contains all/segmented data of a digital property.

Each view contains multiple reports for a property. So whenever you are looking at Google Analytics data, you are actually looking at one of the reports of a view and this view belongs to some property.

Introduction to Roll up Property

A rollup property is a special type of GA property whose hit data comes from other GA properties (also known as source properties).

In other words, a rollup property is made up of two or more source properties.

In a ‘simple rollup property setup’, a company that owns multiple websites/subdomains create one rollup property and this rollup property contains hit data (pageview, screenview, event, transaction, etc) from its other GA properties (also known as source properties in the context of rollup reporting):

Since a property generally represents a website, the ‘simple rollup property setup’ below is the same as the one above:

Sometimes because of unique measurement requirements, a company may need to create a new Google Analytics account just to handle rollup data. This account is called a roll up account and it contains multiple rollup properties:

Note: If you see the symbol ‘P’ next to a property then it means it is a premium property (available only to Google Analytics premium users).

You work with rollup account/property in the same way you work with any other GA account/property. So you can also create several views in a rollup property and these views are knowns as rollup views.

It is the presence of rollup property which makes rollup reporting possible in Google Analytics.

All of the reports in your rollup property show data that is aggregated from several source properties. So in roll up reports, you see collective acquisition, collective behaviour and collective conversion data for all of the linked source properties.

For example lets say you have got two websites: website A and website B.

Website A got 100 visits and Website B got 200 visits.

Website A got 10 conversions and Website B got 20 conversions.

Now your rollup property (which includes traffic data of both website A and Website b), will show total visits (i.e. 100+200 = 300) for both websites in its default view. Similarly, you will see total conversions (i.e. 10+20 = 30) for both websites in your rollup property’s default view.

Rollup properties are listed along with your other properties on the admin page.

The name of the rollup property should contain the word ‘rollup’ so that it becomes easy to recognize it in a property list:

The advantage of using rollup property is that, you don’t need to export data from different web properties and then aggregate them offline via spreadsheets in order to measure the overall performance. A rollup property can do all of these tasks for you automatically. 

Planning Roll up properties Setup

Before you actually set up rollup properties, you need to plan out in advance how the rollup properties structure should look like. This structure will depend upon the number and type of digital properties you own and your measurement requirements.

For example, if you have set up separate websites for each country (like abc.com, abc.co.uk, and abc.com.au) and you want to see aggregated global performance metrics in one view, then the structure of your rollup property would be something like the one below:

If you have set up several sub-domains (like music.abc.com, travel.abc.com, art.abc.com) and you want to measure the overall performance of the website, then the structure of your roll-up property would be something like the one below:

Tracking Object

Before you can implement roll up reporting, there is one more thing that you need to be aware of and that is tracking objects. I explained about tracking objects in the article: Understanding trackers in Google Analytics

A tracking object (also known as a tracker) is used to send traffic data to a Google Analytics web property.

You can not send hit data to a GA property without first creating a tracking object.

For example, the following line of code creates a default tracking object through Google Analytics ‘create’ command and then associate the tracking object with the web property whose id is ‘UA-12345-67’:

ga(‘create’, ‘UA-12345-67′, ‘auto’); // send data to the web property whose ID is ‘UA-12345-67’.

You can see this line of code in the Google Analytics tracking code:

If you remove the highlighted code from your tracking code, then Google Analytics won’t be able to send any hit data to your web property and you won’t see any data in your reports, going forward.

Note: ‘auto’ is not the name of the tracking object. The default tracking object has got no name.

If you want to send data to multiple web properties from a single web page, then you need to create and use multiple tracking objects on the same web page.

So if you want to send your hit data to another property (whose ID is say: UA-12345-89) too, then set up one more tracking object:

ga(‘create’, ‘UA-12345-89′, {‘name’: ‘newTracker’}); // New tracker

Now in order to also send the pageview data to the new tracking object, you need to use the ‘newTracker.send’ Google Analytics command:

ga(‘newTracker.send’, ‘pageview’); // send pageview data to the new tracker

Your Google Analytics tracking code will now look like the one below:

Note: A tracking object represents a web property.

Sending data to multiple properties from a single web page is the primary requirement for setting up rollup reporting.  

Setting up Roll up properties in Google Analytics

Step-1: Gather measurement requirements and then plan the structure of your rollup property.

Step-2: Create a new property in your GA account and name it your ‘Company_Name + Rollup’:

Step-3: Note down the property ID (also known as tracking ID) for your new rollup property. You will need this ID later in order to set up rollup reporting.

Step-4: Edit the Google Analytics tracking code of the first website (i.e. source property) whose hit data you want to add to your new rollup property:

<script>
(function(i,s,o,g,r,a,m){i[‘GoogleAnalyticsObject’]=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,’script’,’//www.google-analytics.com/analytics.js’,’ga’);

ga(‘create’, ‘UA-12345-67’, ‘auto’);
ga(‘create’, ‘UA-12345-89’,{‘name’:’rollupProperty’}); // create a new tracking object and name it ‘rollupProperty’
ga(‘send’, ‘pageview’);
ga (‘rollupProperty.send’,’pageview’); //send pageview data to the roll up property
</script>

Note: Do not copy-paste this code. It won’t work for you. Modify this code by using your own property IDs

Step-5: Copy-paste the modified Google Analytics tracking code to each page of your website and then check the real-time reports of the default view in the rollup property to make sure that it is getting the traffic data. Also, check the real-time reports of the default view of the source property to make sure that it is still getting the traffic data.

Congratulations you have just implemented rollup tracking. But unfortunately, this is just the beginning and more or less a baby step towards rollup reporting.

In order to fully implement roll up reporting, you need to share much more than pageview data with the rollup property. You need to update all of your event tracking code, ecommerce tracking code and any other additional tracking code used on the source property’s website.

So for example if you want to share event tracking data of the source property’s website with the rollup property’s website then you need to add an additional line of the code like the one below:

ga(‘rollupProperty.send’,’event’,’Profitable Engagement’,’time on page more than 3 minutes’)”,180000);  // send event hit to the rollup property. 

Step-6: Repeat steps 4 and 5 for each source property.

Step-7: Create and apply a new filter in the rollup property’s default view, through which you can view the full page URLs in your rollup reports. You need this filter in order to differentiate between web pages of two different websites.

Drawbacks of Standard Rollup Reporting

While standard rollup reporting is easy to implement, it has its own drawbacks:

#1 De-duplication of unique users is not possible in the case of standard roll up reporting. What that means is that you can’t see the total unique visitor reach of all of your websites and/ or apps in a roll up view.

#2 You need to re-tag several websites in order to set up a rollup property.

#3 You can not automatically share the data imported to a source property with the rollup property just by using multiple trackers. In other words, a rollup property does not automatically include either the data you manually imported into source properties (like cost data, user data, product data, custom dimensions or custom metrics) nor the data your source properties inherited by linking to corresponding Adwords, Adsense, google webmaster tools, etc.

If you want imported data of various source properties in your rollup property then you need to link your rollup property to all the linked accounts of your source properties. So if one of your source properties is linked to an AdWords account then you also need to link that AdWords account to your rollup property. Similarly, you need to import all of the data you manually imported to various source properties, to your rollup property. Lots of work. I know.

#4 You can’t evaluate the performance of multiple source properties side by side.

#5 Your rollup property won’t collect data retroactively from the source properties.

If you want to overcome all of these limitations then you need to use Premium Rollup Reporting.

Roll up Reporting in Google Analytics Premium

If you are using Google Analytics premium then all you need to do to set up roll up reporting is, to contact the GA premium customer support. They can create new rollup properties for you.

They will ask you details like account number, time zone, the number of rollup properties you want to create and the source properties you want to include in your rollup properties, etc.

Note: You won’t find a button like ‘create rollup property’ in your premium account.

Once the rollup properties are in place and you have got the ‘edit permission’ at the rollup property level, you can manage a rollup property (i.e. add or remove individual source properties or change the display names of the source property) by going to Admin and then clicking on the ‘Rollup management’ link under the ‘property’ column.

Advantages of Premium Roll up Reporting

#1 Premium roll up reporting allows the de-duplication of unique users. What that means is that you can see the total unique visitor reach of all of your websites and/or apps in a roll up view.

#2 You don’t need to re-tag several websites in order to set up a roll up property. Although re-tagging is still required but now it is the headache of the GA premium team and not yours.

#3 Premium rollup properties also don’t automatically inherit the data which was imported to source properties. This data includes the data you manually imported into source properties (like cost data, user data, product data, custom dimensions or custom metrics) and the data your source properties inherited by linking to corresponding Adwords, Adsense, google webmaster tools etc.

If you want imported data of various source properties in your rollup property then you need to link your rollup property to all the linked accounts of your source properties.

However GA premium makes it easier to share the data imported to a source property with a rollup property via a Dimensions mapping or Metric mapping:

Since a rollup property does not automatically inherit custom dimension/metric data from source properties, you need to create new custom dimensions and metrics in your rollup property and then map them to the custom dimension and metrics you created for individual source properties. Such type of mapping is known as dimension mapping or metric mapping:

Through dimension/metric mapping you can easily inherit custom dimension/custom metric data from source properties into your rollup account.

However, you don’t need to worry about uploading imported data of various source properties to your premium rollup property or carrying out dimension/metric mapping. Your GA premium account manager can do all of that for you.

Note: Dimension/Metric mapping feature is available only to GA premium users.

#4 You can evaluate the performance of multiple source properties side by side in a premium rollup property through the ‘Source Properties’ report (under Audience > Roll-Up Reporting menu):

Through the source properties report you can compare various brands and/or business units websites to each other and determine which are underperforming or outperforming. The primary dimension for this report is the Source Property Display Name.

Note: Source properties report is available only to GA premium users.

Drawbacks of Premium Roll-up Reporting

#1 You can aggregate data from only those source properties which belong to the same GA account as the roll-up property. So the best time to set up a roll-up account is when you are implementing Google Analytics for the first time on your website.

#2  You can not use a premium roll-up property as a source property for another premium rollup property.

#3 Premium rollup properties don’t collect data retroactively from source properties.