E-commerce
September 30, 2026
Are you wondering how to understand your customers' mobile behavior with cross-device reports? These reports show you how your visitors switch from one screen to another before purchasing, a crucial piece of data for adapting your e-commerce strategy.
In just a few clicks, you can identify whether your sales come from a single device or multiple ones, and which channels assist the conversion. However, please note: this data is only available for users who have enabled ads personalization, and it sometimes takes several days to get actionable results.
So how do you understand mobile behavior with cross-device reports? On the agenda:
Why are cross-device reports essential for your store?
How to activate cross-device reports in Google Analytics?
What does the Device Overlap report reveal about your customers?
How to use the Device Paths report to track purchase journeys?
What checklist to use for leveraging this data daily?
Let's get started.
Summary
Why are cross-device reports essential for your store?
Your website's traffic has shifted massively to mobile in recent years. Ignoring this change means risking a misunderstanding of your customers and losing sales. Google Analytics' cross-device reports give you a clear view of how your visitors use multiple screens before making a purchase.
These reports help you answer concrete questions: do your customers visit only from their phones? Do they use desktop to finalize their purchase? Which devices assist in the conversion?
By knowing these behaviors, you can adapt your site: simplify the mobile journey, highlight micro-conversions like newsletter sign-ups, or optimize pages that lead to a purchase. This is a direct lever for increasing your conversion rate, as we explain in our article on e-commerce CRO.
For example, if you find that the majority of your mobile visitors drop off on the payment page, you can simplify the form or offer express payment options. Similarly, if desktop is used for in-depth research, you can enrich your product pages with detailed comparisons. These data-driven adjustments allow you to meet the precise expectations of each audience segment.
Convert over 2,000 customers on average per month with Qstomy.
The world’s 1st Shopify AI dedicated to customer conversion
Empowering 200+ e-commerce merchants
How to enable Google Analytics Cross-Device reporting?
To access Cross-Device reports, log in to Google Analytics and open the "Audience" section, then "Cross-Device". If you see the message "Activate Google signals", click "Continue", then "Activate" on the next page.
Once activated, it takes several days or even weeks for the data to populate. If you receive the message "Your cross-device reports do not contain enough data", it means your traffic has not yet reached the minimum threshold required by Google.
These reports only concern users who have enabled "ads personalization" in their Google account. This is a limitation to keep in mind to correctly interpret the figures. To go further with the configuration, consult our guide on enhanced e-commerce tracking.
Also make sure your site is properly tagged with enhanced e-commerce tracking, as this will allow you to cross-reference cross-device data with transactions. Verify that the tags are up to date and that conversions are correctly recorded. A rigorous configuration is key to obtaining reliable and actionable data.
What does the Device Overlap report reveal about your customers?
The "Device Overlap" report provides an overview of your users by device category: desktop, mobile, tablet. It also shows how these devices overlap, meaning whether the same visitor uses multiple screens to interact with your site.
The bar chart indicates the number of users who visit your site via each device separately, and those who use multiple devices, for example "desktop + mobile". The Venn diagram illustrates the relative size of each device and the overlaps between two or three of them.
At the bottom of the page, a table details metrics like users, sessions, and revenue, by device category. This data helps you identify if a device is under-utilized or on the contrary over-performing, and adjust your priorities.
For example, if you notice that users who combine mobile and desktop have a higher average cart value, you can create remarketing campaigns targeting this segment. Similarly, if the tablet is rarely used, you can focus your efforts on the other two screens. These insights allow you to optimize your marketing budget and improve the user experience.
How to use the Device Paths report to track purchase journeys?
The "Device Paths" report is a detailed version of the table from the previous report. It segments data according to several criteria: the stages of the journey, before or after an interaction, a goal, a transaction, a specific event, a page, or a precise goal.
For an online merchant, the most useful segmentations are: the stages of the journey or before an interaction, any transaction, and a specific goal. For example, you can see if a customer starts their journey on mobile and then finalizes it on desktop.
This information helps you understand where drop-offs occur and optimize friction points. To improve the purchasing experience, also consider using a chatbot trained with your Shopify data to guide your customers at the right time.
By analyzing journeys, you can identify the most profitable device combinations and adapt your campaigns accordingly. For example, if the mobile-then-desktop journey generates more conversions, you can offer an incentive to switch to desktop, such as a cart reminder. These targeted actions reduce drop-offs and increase the conversion rate.
How does the Channels report cross-reference devices and channels?
The "Channels" report allows you to break down data by device and acquisition channel, such as organic search or paid search. It is a valuable tool for finding out if your advertising campaigns are performing better on mobile than on desktop, for example.
Currently, this report does not integrate with other Google Analytics reports, but this feature is likely to be added in the future. Keep in mind that this suite of reports is still in beta.
In the meantime, you can cross-reference this data with your Google Ads campaigns to refine your bids and messaging. To correctly set up conversion tracking, consult our guide on e-commerce tracking in Google Ads.
For example, if you find that paid search performs better on mobile, you can increase your bids for mobile and adapt your ads with more direct calls to action. Conversely, if desktop generates more organic clicks, you can strengthen your SEO content for this medium. These adjustments allow you to maximize the return on investment for each channel.
What does the Acquisition Device report measure?
The "Acquisition Device" report identifies the device that attracted new users, as well as the revenue generated by those users, including that from other devices. It is an extension of the "multi-channel funnels" that Google has been offering for a long time.
This report allows you to know if a particular device, combined with other dimensions, not only closed sales but also introduced users for future sales. For example, mobile can be an excellent discovery channel, even if it does not convert directly.
This information is essential for evaluating the role of each device in your conversion funnel and adjusting your marketing investments accordingly.
By identifying the devices that assist conversion, you can better allocate your advertising budget. For example, if mobile is a powerful lead generator, you can invest more in brand awareness campaigns on mobile, while optimizing desktop for the final conversion. This holistic approach improves the overall effectiveness of your strategy.
How to interpret data to improve your sales?
Multi-device reports help you understand whether your customers are coming from a single device or multiple devices. If the majority of your visitors use a single device, focus your efforts on optimizing that specific journey.
If some devices assist more than they convert, such as mobile which brings in many new users but few direct sales, ensure that micro-conversions are easy to complete: newsletter sign-up, click-to-call, add to cart.
For high-priced products, the buying cycle is often longer. Identify the most viewed content on each device and optimize it so that it is easily accessible. By improving the content, you can shorten the time to purchase. To go further, discover how to use CRM data to better respond to your customers.
For example, if you sell high-end furniture, your customers might read reviews on mobile, then compare dimensions on desktop. By making this information easily accessible on both platforms, you facilitate decision-making. You can also set up personalized cart reminders based on the device used to encourage purchase completion.
What are the limitations of cross-device reporting?
Cross-device reports are powerful, but they have limitations. First, they only work for users who are signed in to their Google account with ad personalization turned on. This excludes a portion of your audience, which can bias the results.
Second, the data is not available immediately. It can sometimes take several days or weeks after activation to get actionable figures. If your traffic is low, you risk seeing the message "not enough data".
Finally, these reports are still in beta, which means that some features may evolve. Keep an eye on Google Analytics updates to stay up to date, as we recommend in our article on performance measurement with GA4.
To compensate for these limitations, it is advisable to cross-reference this data with other sources, such as CRM data or customer surveys. This allows you to get a more complete view of your visitors' behavior. By combining the insights, you can make more informed decisions and avoid relying solely on partial data.
How can you integrate this data into your marketing strategy?
Cross-device reports are not just an analysis tool: they must guide your marketing decisions. For example, if mobile is the main channel for discovery, invest in ad campaigns optimized for mobile, with fast and responsive landing pages.
If desktop generates more conversions, focus your efforts on improving the desktop experience, such as loading speed and the clarity of product information. Use data to personalize your messages based on the device.
Also, consider cross-referencing this data with your Google Shopping campaigns to measure the ROI of each device. Our article on the effectiveness of Google Shopping ads provides you with concrete leads.
For example, you can create specific audiences for mobile remarketing, with special offers for users who visited your site on this device. Similarly, on desktop, you can highlight detailed buying guides to assist in the decision-making process. By tailoring your messages to each screen, you increase relevance and engagement.
How to prepare your store for a seamless multi-device journey?
To take advantage of cross-device reporting, your store must offer a consistent experience across all screens. Make sure your site is responsive, loading times are fast on mobile, and the checkout process is simple on every device.
Also, consider synchronizing shopping carts between devices: a customer who adds a product on mobile should find it on desktop. This reduces friction and encourages completion of the purchase.
Finally, use data to identify pages that perform poorly on a specific device and optimize them. For a comprehensive overview, create custom dashboards, as explained in our guide on e-commerce KPI visualization.
For example, if you find that the checkout page has a high abandonment rate on mobile, you can simplify the form or offer express payment options like Apple Pay. Similarly, if product pages are rarely viewed on tablets, you can optimize their layout for this format. These targeted improvements enhance the overall experience and increase conversions.
How does Qstomy help leverage multi-device data?
Qstomy, the Shopify AI agent, helps you transform multi-device insights into concrete actions. Thanks to its recommendation and upsell features, it guides your customers towards making a purchase, regardless of the device they are using.
Qstomy can also manage parcel tracking and after-sales service, which reduces post-purchase friction and improves satisfaction. By analyzing behaviors, it identifies cross-sell and average order value opportunities, just like an expert would.
With more than 100 merchants supported, Qstomy is designed to increase your conversion rate and revenue. To learn more about creating an appropriate payment gateway, read our article on e-commerce payment gateways.
For example, if a customer adds a product on mobile but abandons it, Qstomy can send them a personalized reminder with a special offer, regardless of the device they use next. Furthermore, by analyzing multi-device journeys, Qstomy can recommend complementary products at the right time, thereby increasing the average order value. These automated actions save you time and improve the effectiveness of your marketing.
What is the checklist for using cross-device reports on a daily basis?
Checklist to get started
Activate cross-device reports in Google Analytics.
Wait for the data to populate (several days).
Analyze the Device Overlap report to see overlaps.
Segment by transaction and goal in Device Paths.
Optimize micro-conversions on mobile.
In brief
Cross-device reports give you a clear view of the customer journey across all screens. Use them to adapt your content, your campaigns, and your website, and to improve your conversion rate.
FAQ
Why are my cross-device reports empty? The traffic has not yet reached Google's threshold, or users have not activated ads personalization.
Can I see data for all my visitors? No, only those who have activated ads personalization in their Google account.
How can I improve mobile conversions? Simplify the journey, offer easy micro-conversions, and ensure that the website is fast.
By following this checklist, you will be able to make the most of cross-device reports. Don't forget to consult these reports regularly to track changing behaviors and adjust your strategy accordingly. With a data-driven approach, you will continuously optimize your customers' experience and increase your sales.
Comment suivre les ventes de plusieurs sites avec un seul tunnel de commande dans Google Analytics ?
Enzo
September 30, 2026
