You can group campaign visits without storing a persistent visitor cookie by labeling links with consistent campaign parameters and reporting those labels as traffic-source dimensions. This shows where a tagged arrival came from; it does not identify the same person across later visits. In Google Analytics 4 (GA4), choose the reporting scope—first user, session, or event—that matches the question you want to answer.
Use campaign labels to group tagged visits
UTM parameters are labels attached to a landing-page URL. They let analytics tools classify visits by the values in the link, without needing a persistent cookie just to label that arrival. Google Analytics maps custom campaign values in the page location to traffic-source dimensions. For example, values such as utm_source=promo_email, utm_medium=email, and utm_campaign=january_promo identify the source, medium, and campaign. See Google’s campaign and traffic source documentation.
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Agree on a naming convention before creating links. Use the same spelling and capitalization for recurring sources and mediums; otherwise, a report can split one channel across several labels. Add utm_id or utm_content when you need a campaign identifier or want to distinguish creative or placements. Do not add fields without a reporting purpose.
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- Define the allowed values for source, medium, and campaign. For example, use a stable source label for a newsletter and a consistent medium label for email.
- Build campaign URLs with the agreed values, and use optional fields such as
utm_idorutm_contentonly when they help distinguish campaigns or link variants. - Test the final destination after every redirect or URL-shortening step. Confirm the landing URL still contains the parameters and that the analytics report classifies the visit as expected.
- Keep a shared record of campaign names and their intended meanings so that future links do not introduce near-duplicate values.
Preserve parameters through redirects
Correctly tagged links are useful only if their parameters arrive at the landing page. Redirects and URL shorteners can remove UTMs or referral details. Check the complete route from the original link through any tracking or shortening service to the final page. Google lists parameter loss among the possible causes of traffic appearing as (direct) / (none) in its direct traffic guidance.
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Test links used in email, social posts, ads, and other campaigns rather than assuming every platform preserves them. If a campaign URL is rewritten, shortened, or redirected, verify the destination itself, not just the link as originally created.
Use referrers as a fallback, not a complete record
When campaign fields are absent, the document referrer may help identify the referring site or page. It is not a guaranteed source label: a browser or app may provide no referrer, a redirect may remove it, and a hostname alone may not identify the particular campaign or placement. Google describes how referrer and campaign information are processed in its campaign documentation.
Do not interpret (direct) / (none) as proof that someone deliberately typed the address. Google also identifies missing campaign information, stripped parameters, offline documents, and ad blockers as possible reasons Analytics lacks a clear referral source. Direct traffic is therefore a bucket for visits without a usable source signal, not a reliable description of user behavior. See Google’s explanation of direct traffic.
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GA4 traffic-source dimensions describe different moments in a user’s activity. A first-user dimension answers how a person first arrived; a session dimension describes the source associated with a session’s start; event-scoped attribution applies to events. These are not interchangeable ways of labeling the same report. State the scope whenever you compare channels or present acquisition results. Google explains the distinction in Scopes of traffic-source dimensions.
- First user: Use when the question is how users were initially acquired.
- Session: Use when the question is where a session came from.
- Event: Use when the question concerns attribution for events.
A campaign or source signal received partway through a session should not be assumed to rewrite the session’s original source. Google notes that source information sent mid-session may be associated with relevant events without replacing the session source. Keep the report’s scope visible so readers do not mistake an event-level result for session acquisition.
Understand what cookie settings change
Campaign labeling and consent-controlled collection are separate decisions. Google Consent Mode communicates consent status to Google tags; it does not provide the consent banner or consent-management platform. Google distinguishes two patterns: basic mode blocks tags until consent is given, while advanced mode can send measurements without cookies when storage consent is denied. A cookieless measurement signal is still data being sent. See Google’s Consent mode overview.
That distinction matters if the goal is to avoid persistent cookies versus preventing collection before consent. Basic mode holds tags; advanced mode can transmit measurement signals while storage is denied. Choose and configure a mode in line with your consent requirements and implementation rather than treating “cookieless” as synonymous with “nothing is collected.”
Use server-side collection for architecture, not as a consent workaround
Server-side tagging changes where some collection and tag processing happen; it does not by itself make collection cookie-free or consent-free. Google’s documented server-side setup uses a web container, a server container, a compatible consent solution, and a GA4 client in the server container. Its implementation guidance describes passing consent choices from the web container to the server container: Implement consent mode with server-side Tag Manager.
The Measurement Protocol sends events directly to Analytics over HTTP and can support server-side or offline interactions. Google says its purpose is to augment automatic collection through gtag, Tag Manager, or Firebase—not replace it. A Measurement Protocol-only setup may produce partial reporting. Treat it as a way to supplement an existing collection design, not a shortcut around consent or the need to decide which data to collect. See Google’s Measurement Protocol documentation.
Quick Recap
Best Value
Pick an approach based on the signal you need
| Approach | What it can group | Cookie dependence | Key limitation |
|---|---|---|---|
| UTM campaign labels | Tagged links by source, medium, campaign, and related fields | The label travels in the URL; a persistent cookie is not inherently needed to classify that arrival | Requires consistent tagging and parameter preservation; does not create cross-session identity |
| Referrer reporting | Referring hostname or page when available | Can provide source context without a source-persistence cookie | Referrers can be absent, stripped, or too broad to identify a campaign |
| Consent Mode | Google tag measurements under consent-dependent behavior | Advanced mode may send measurements without cookies when storage is denied | Advanced mode still sends measurement signals; basic mode blocks tags pending consent |
| Server-side tagging or Measurement Protocol | Server-side and offline events, with consent signals in a server-tagging setup | Server architecture alone does not establish cookie-free or consent-free processing | Measurement Protocol is intended to supplement automatic tagging; used alone, it may yield partial reporting |
| Privacy-oriented analytics platform | Vendor-documented source, campaign, and referrer reports | Sealmetrics states that its analytics operates without cookies | That is a vendor claim; assess the actual implementation and applicable jurisdiction independently. See Sealmetrics documentation. |
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