What are UTM parameters?

UTM parameters are tags added to a URL (utm_source, utm_medium, utm_campaign, utm_term, utm_content) that tell Google Analytics exactly where a visitor came from - which ad, email, or post drove the click.

Which UTM parameters are required?

utm_source and utm_medium are the essential pair; utm_campaign is strongly recommended. utm_term and utm_content are optional refinements for keywords and A/B variants.

Why should UTM values be lowercase?

Analytics treats Facebook and facebook as two different sources, splitting your data. Keeping everything lowercase with hyphens prevents fragmented reports.

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UTM Links: Stop Guessing Where Your Customers Come From

Without UTM tags, half your marketing shows up in Google Analytics as "direct" traffic - a black hole that tells you nothing. Tag every link you put in an ad, email, social post, or QR code, and GA4 will show you precisely which channel, campaign, and even which button drove each visit and sale.

The five parameters, in plain English

utm_source - where the link lives: google, facebook, newsletter.
utm_medium - the channel type: cpc, email, social, offline.
utm_campaign - the push it belongs to: summer-sale-2026.
utm_term - the paid keyword (mostly for search ads).
utm_content - which variant: banner-a vs text-link, for A/B comparisons.

Naming rules that save your reports

Lowercase everything. Facebook and facebook become two different rows in your reports.
Hyphens, not spaces. Spaces turn into %20 and look broken in front of clients.
Be consistent. Decide once (e.g. email not e-mail/newsletter/mail) and reuse - the history panel above helps you remember your convention.
Never UTM internal links. Tagging links within your own site overwrites the visitor's real source.

Print and offline tracking

UTM links shine offline too: build a link with utm_medium=offline, turn it into a branded QR code with the QR Code Generator, and your flyers and packaging become measurable channels.

Frequently asked questions

Do UTM parameters affect SEO?

They can create duplicate-URL noise if search engines index tagged URLs, but a canonical tag on your pages (which every well-built site has) neutralizes it. Never use UTMs on internal links and you're safe.

Where do I see UTM data in GA4?

Reports → Acquisition → Traffic acquisition, or build an Exploration with the session source/medium and session campaign dimensions.

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A naming convention that keeps reports clean

UTM parameters only help if everyone tags links the same way. GA4 treats Facebook, facebook and fb as three different sources, splitting your data. Agree on a convention and stick to it.

Parameter	Answers	Convention	Examples
utm_source	Where did the click come from?	Lower-case platform or partner name	facebook, newsletter, google, qr
utm_medium	What type of channel?	Use GA4’s recognised mediums so default channel grouping works	social, paid_social, email, cpc, referral, print
utm_campaign	Which campaign?	Lower-case, hyphenated, dated	spring-sale-2026, webinar-oct-2026
utm_content	Which version or placement?	Describe the variant	hero-button, footer-link, video-a
utm_term	Which keyword? (paid search)	Optional	logo-resizer

Where to use UTM links — and where not to

Use them on links you place outside your website: social posts, email newsletters, partner sites, ads without auto-tagging, and printed QR codes.
Never use them on internal links between your own pages. They overwrite the visitor’s real source and start a new session in analytics.

UTM links and QR codes

Printed QR codes are a classic blind spot in analytics — scans look like direct traffic. Tag the destination with utm_source=qr and utm_medium=print, but keep the printed URL short by pointing the QR code at a redirect on your own domain that forwards to the tagged link. Shorter URLs make sturdier QR codes; see the QR code with logo guide.

Privacy

Never put personal information such as email addresses or names into UTM values; they are visible in the address bar and stored in analytics. Recent links are kept only in your browser’s local storage, and you can clear them at any time.