What are UTM parameters and how to use them to measure your campaigns

UTM parameters (Urchin Tracking Module) are text fragments added to the end of a URL to identify the source and characteristics of a marketing campaign (Wanaleads, 2024; Analytics Mania, 2025).

By tagging links with these parameters, tools like Google Analytics 4 (GA4) can precisely record which source, medium and campaign each visit comes from, enabling analysis of which actions generate the most traffic and conversions (Semrush, 2024; MeasureMinds, 2025).

In practice, UTMs work like a "return address" for every link: they tell you who sent the traffic, through which channel and in the context of which campaign (ShareMySaaS, 2025).

What are UTMs used for in GA4?

In GA4, UTM parameters remain one of the most reliable ways to measure campaign performance across search, social media, email marketing and other channels (Disruptivos, 2025; NothingAD, 2025).

The key benefits highlighted by specialist guides include (Wanaleads, 2024; Analytify, 2025; ShareMySaaS, 2025):

  • Precise traffic attribution: identify exactly which campaigns, sources and media generate visits and conversions.
  • Budget optimisation: compare channels side by side and shift spend towards the most profitable tactics.
  • Detailed behaviour analysis: understand how users interact based on the origin of their click.
  • ROI measurement by channel: by combining UTMs with conversion and revenue data, you can calculate return on investment per campaign.

Without UTM tags, most traffic appears as "direct" or gets lumped into unhelpful categories, whereas well-defined tags provide a much clearer view of the impact of every action (Semrush, 2024; ShareMySaaS, 2025).

The five main UTM parameters

Most guides agree on five "classic" parameters that can be added to URLs (Semrush, 2024; Demomentsomtres, 2025; Analytics Mania, 2025):

utm_source (Source)

Indicates where the traffic comes from: for example, google, facebook, newsletter, linkedin.

It identifies the specific platform or site that sends the visits (Wanaleads, 2024).

utm_medium (Medium)

Specifies the type of channel or vehicle: for example, cpc, email, social, referral.

It helps to group traffic into broad categories (paid, email, social, etc.) (Semrush, 2024; Funnel.io, 2021).

utm_campaign (Campaign)

Names the specific marketing campaign, such as black_friday, launch_2026 or summer_promo_2025 (Demomentsomtres, 2025).

This parameter allows you to compare performance across campaigns with different objectives.

utm_term (Term)

Typically used to record the keyword in paid search campaigns or to describe the targeting type in other channels (Analytics Mania, 2025; Funnel.io, 2021).

utm_content (Content)

Differentiates ad or link variants within the same campaign, for example banner_a, banner_b or cta_header, cta_footer (Demomentsomtres, 2025; Mailjet, 2026).

Official recommendations state that, at a minimum, you should always fill in utm_source, utm_medium and utm_campaign, and use utm_term and utm_content for more detailed analysis (Analytics Mania, 2025; Analytify, 2025).

Additional UTM parameters in GA4

Beyond the classic parameters, GA4 and some recent guides mention additional tags that allow greater granularity (Disruptivos, 2025; Aditu, 2024; Analytify, 2025):

  • utm_id: unique campaign identifier.
  • utm_source_platform: source platform (e.g. facebook, instagram, linkedin_ads).
  • utm_creative_format: creative format (banner, video, carousel).
  • utm_marketing_tactic: marketing tactic (retargeting, prospecting, remarketing).

These fields are especially useful for teams managing many campaigns who need to link Analytics data with other tools like CRMs or automation platforms (Disruptivos, 2025; MeasureMinds, 2025).

Example URL with UTM

A typical example, similar to those shown in email marketing and GA4 guides, would be (CaptainVerify, 2025; Mailjet, 2026):

URL without UTM:

https://yoursite.com/offer

URL with UTM:

https://yoursite.com/offer?utm_source=newsletter&utm_medium=email&utm_campaign=may_promo_2025&utm_content=cta_header

In this link:

  • utm_source=newsletter indicates the traffic comes from a newsletter.
  • utm_medium=email specifies the channel is email marketing.
  • utm_campaign=may_promo_2025 identifies the specific campaign.
  • utm_content=cta_header differentiates this button from other links within the same email (Mailjet, 2026).

How to create UTM links correctly

Google and various providers recommend using URL builders to avoid syntax errors and maintain naming consistency (Analytics Mania, 2025; NothingAD, 2025).

The most commonly repeated best practices include (Demomentsomtres, 2025; Doppler, 2026; Semrush, 2024):

  • Use lowercase and hyphens (summer_promo_2026) instead of spaces or capitals, to avoid duplicates in reports.
  • Define an internal naming guide for utm_source, utm_medium and utm_campaign so the entire team tags campaigns consistently.
  • Avoid generic terms like banner1 or new_campaign that provide no useful information.
  • Always test the generated URL to make sure it opens the expected page correctly.

Several articles note that tools like Google's Campaign URL Builder simplify this process and reduce errors when creating links (NothingAD, 2025; Analytify, 2025).

Where to use UTM parameters

UTMs are especially useful in channels where the link is created manually or there is no automatic tagging (Mailjet, 2026; Funnel.io, 2021):

  • Email marketing: newsletters, automated sequences, transactional emails with promotional links.
  • Social media: organic posts, bio links, paid ads that don't integrate directly with Google Ads.
  • Display and affiliate campaigns: banners, links from external blogs, collaborations.
  • QR codes and offline materials: flyers, posters, packaging — where the user arrives via a short UTM-tagged URL.

Conversely, it is not recommended to use UTMs on internal links within your own site, as they could overwrite the real source of the original traffic (Analytics Mania, 2025; Funnel.io, 2021).

Common mistakes when using UTM parameters

Guides agree on several common errors to avoid (Semrush, 2024; ShareMySaaS, 2025; MeasureMinds, 2025):

Not maintaining naming consistency

Using different variants for the same source (Facebook, facebook, fb) creates fragmented data that is difficult to analyse.

Tagging internal links

Adding UTMs to links within your own site breaks original attribution, making Analytics think the traffic comes from your own website instead of the actual external channel.

Filling all fields with redundant information

Repeating the same value in source, medium and campaign reduces the usefulness of reports. Each parameter should contribute a different piece of information (Demomentsomtres, 2025; ShareMySaaS, 2025).

Forgetting to link UTMs with goals and conversions

Tagging links without having configured conversions or goals makes it impossible to translate those clicks into business results (NothingAD, 2025; MeasureMinds, 2025).

Best practices for getting the most out of UTMs

The most consistent recommendations for advanced UTM usage include (Wanaleads, 2024; Disruptivos, 2025; ShareMySaaS, 2025):

  • Define a tagging scheme per channel upfront (e.g. utm_medium=email for all emails, utm_medium=cpc for paid ads).
  • Centralise link creation in a single tool or shared document to avoid duplicates or inconsistent formats.
  • Periodically review GA4 reports to verify that campaigns are grouped as expected and correct naming errors.
  • Use utm_content and utm_term for A/B experiments and segmentation, identifying which creatives, placements or audiences perform best (Analytics Mania, 2025; Mailjet, 2026).

When these practices are applied, UTM parameters become one of the most solid foundations for making data-driven marketing decisions and improving campaign ROI (Analytify, 2025; ShareMySaaS, 2025).

Conclusion

UTM parameters are a simple yet extremely powerful tool for measuring and optimising campaigns in GA4 and other analytics platforms.

By adding these tags to your links and following a few best practices — naming consistency, avoiding internal tagging, and linking UTMs with clear goals — you'll know precisely which sources, media and campaigns generate the most traffic, leads and revenue (Wanaleads, 2024; Semrush, 2024).

This allows you to move beyond guesswork and base your investment decisions on reliable data about the real performance of each channel (Disruptivos, 2025; ShareMySaaS, 2025).

Tag and measure your campaigns

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References (APA format)