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.

Free UTM Link Builder for GA4

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Links you copy are saved here (in your browser only) so you can reuse a naming convention.

Related tools

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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