Safari began blocking third-party cookies in 2017, with Firefox following in 2019. Chrome then moved ahead with its Privacy Sandbox changes in 2024. Today, cookie restrictions affect more than 60% of web traffic, while 67% of US adults actively manage or block cookies. Businesses still relying on pixel-only tracking methods from 2020 could therefore be missing between 30% and 50% of their conversion data.
Browsers are placing tighter and tighter restrictions on tracking. Ad blockers are widely used but more so people are aware and are rejecting non-essential cookies. As a result, analytics platforms may only see part of the customer journey. A visitor could click a paid advert, browse several pages, return later and submit an enquiry. The business receives the lead, but its reporting may not connect that conversion to the original campaign. It could instead appear as direct traffic, an unattributed conversion or disappear from the report altogether.
For marketers, this creates an obvious problem. How do you decide which campaigns deserve more investment when some of the results are missing? The answer is not to ignore consent or look for ways around it. It is to build a more varied, privacy-conscious tracking setup.
Why Cookie-Based Tracking Is Becoming Less Reliable
Traditional tracking often depends on small files stored within a user’s browser. These cookies help analytics and advertising platforms recognise returning visitors and connect activity across different pages or sessions.
However, Safari and Firefox restrict many forms of cross-site tracking, while Chrome has introduced greater user choice and privacy controls. Consent banners also mean many visitors reject analytics or advertising cookies before browsing.
This can lead to incomplete conversion reporting, shorter recorded customer journeys, smaller remarketing audiences and more traffic being grouped as direct or unknown.
That does not make analytics useless. It simply means businesses should stop treating one platform as a complete record of every interaction.
Use Consent Mode to Preserve Useful Signals
Google Consent Mode allows Google tags to adjust their behaviour based on the choices made through a website’s consent banner.
When a visitor accepts cookies, measurement can operate normally. When they decline, tags can send limited, cookieless signals instead of storing advertising or analytics cookies. Google may then use aggregated modelling to estimate some of the activity that could not be observed directly.
This does not recreate an individual user journey, nor should it be treated as a way to bypass consent. Its purpose is to improve overall reporting while respecting the visitor’s choice.
The setup matters. A consent banner that is not properly connected to Google Tag Manager, Google Analytics 4 or Google Ads can either collect data it should not or block more measurement than necessary.
Strengthen Your First-Party Data
First-party data is information collected directly through your own business. This includes enquiry forms, telephone calls, newsletter sign-ups, customer accounts, purchases, bookings and CRM records. Because it comes from a direct customer relationship, it can provide a clearer picture of which marketing activity generates genuine leads and revenue. Campaign details should be captured wherever possible. UTM parameters can identify the source, medium and campaign behind a visit. Hidden form fields can pass this information into a CRM, while call-tracking systems can attribute telephone enquiries to particular channels.
The aim is to connect marketing activity with real commercial outcomes, rather than judging success solely by clicks and sessions.
Consider Server-Side Tracking
With client-side tracking, data is sent directly from a visitor’s browser to platforms such as Google or Meta. Browser restrictions, network issues and ad blockers can interrupt that process.
Server-side tracking introduces a controlled layer between the website and those platforms. Events are processed through a server managed by the business, where unnecessary data can be removed before approved information is forwarded.
This can improve data quality, website performance and control over what is shared. It can also support tools such as Meta’s Conversions API and Google Enhanced Conversions.
However, server-side tracking is not automatically compliant and should never be used to secretly track people who have opted out. Consent rules, data minimisation and privacy requirements still apply.
Look Beyond Google Analytics
Google Analytics is useful, but it should not be the only source used to assess performance. Google Search Console can show organic search clicks and visibility. Advertising platforms provide campaign data. CRM records reveal which leads became customers. Ecommerce platforms show genuine revenue, while call tracking uncovers enquiries that never involved an online form. Privacy-focused analytics platforms can also provide aggregated information such as page views, referrers, landing pages and conversions without relying on persistent personal identifiers.
Although these platforms may offer less detailed attribution, they can provide another valuable view of website traffic and performance.
A Better Approach to Measurement
The future of digital marketing is not about tracking every person across every device. It is about combining reliable information from several sources, accepting that no platform will show the complete journey and focusing on the data that genuinely supports decision-making. A stronger setup may combine a correctly configured consent platform, Google Consent Mode, first-party data, campaign tagging, CRM reporting, call tracking and server-side conversion tools. Attribution will never be perfect. However, a well-planned measurement strategy can still show what is working, where leads are coming from and how marketing budgets should be used.
At FUZE, we help businesses create practical tracking systems that balance useful marketing insight with the privacy choices customers expect. Need help with any of this or completely unsure what data you are getting? Give the team a call today!
