UTM parameters explained in 5 minutes

UTM parameters are tags you add to URLs so your analytics tool knows where traffic came from. Without them, a click from your newsletter and a click from your social post both show up as the same thing – "direct" or "unknown". With them, you can see exactly which link, in which campaign, on which platform, drove each visit.

The five parameters

Parameter	Purpose	Example
utm_source	Where the traffic comes from	newsletter, linkedin, google
utm_medium	How it reaches you	email, social, cpc
utm_campaign	Which specific effort	spring-sale, product-launch
utm_term	Paid search keyword (optional)	analytics+tool
utm_content	Differentiates variants (optional)	hero-cta, sidebar-link

A naming convention that scales

The biggest problem with UTM parameters isn't setting them up – it's keeping them consistent. Here's a convention that works:

• Always lowercase. LinkedIn and linkedin will show as separate sources.
• Use hyphens, not spaces or underscores. Spaces become %20 in URLs, which is messy. Hyphens are readable.
• Be specific but brief. email not email-marketing-channel. spring-sale-2026 not spring_sale_campaign_march_2026_v2_final.
• Document your conventions. Keep a shared spreadsheet. Future you (and your team) will thank you.

Ready-to-use template

Here's a pattern that works for most teams:

?utm_source={platform}&utm_medium={channel-type}&utm_campaign={campaign-name}&utm_content={link-location}

Example for a newsletter link to a blog post:

?utm_source=newsletter&utm_medium=email&utm_campaign=weekly-digest-2026-03&utm_content=featured-article

Build your UTM link

Grandma auto-lowercases and trims spaces for you – because tidy URLs make tidy reports.

Website URL *

Source

Medium

Campaign

Content

Your tagged URL

Enter a URL above to get started

Copy

Common mistakes

• Forgetting utm_medium. Source without medium is like saying "the traffic came from Google" without saying whether it was organic search, paid ads, or a social post.
• Inconsistent casing. Facebook, facebook, and fb create three separate entries in your reports. Pick one and stick with it.
• Tagging internal links. UTM parameters are for external traffic. Using them on links within your own site overwrites the original source – the visitor who came from Google now looks like they came from "homepage-banner".
• Over-tagging. You don't need every parameter on every link. Source and medium are essential. Campaign is almost always useful. Term and content are situational.

Reading the data

Once your links are tagged, your analytics dashboard breaks down traffic by source and medium. Look for:

• Which sources drive the most visits – and whether those visits lead to anything (page depth, goal completions, scroll depth).
• Which campaigns perform best – compare campaign names to see what's actually working.
• Which content variants win – if you used utm_content to differentiate CTA placements, you can see which position drove more clicks.