4.6.2 - How to Use URL Parameters (UTMs) to Track E-commerce Traffic (Difficulty: Advanced | Path: Scale)

How to Name Your UTMs with Rules & Examples (Beginner)

What are UTMs?

UTMs (Urchin Tracking Modules) are simple tags you add to the end of a URL. When someone clicks that link, the tags are sent to your analytics platform, telling you exactly where that person came from and what they clicked on. They look like this: `?utm_source=google&utm_medium=cpc&utm_campaign=summer_sale`.

Why are they important?

Without UTMs, your analytics report might just say 'Direct' or 'facebook.com' for a huge chunk of your traffic. You won't know if that Facebook traffic came from the link in your bio, a post you made, or a paid ad. UTMs let you see the difference, so you know exactly what's working.

The 3 Core Parameters You Must Use:

• `utm_source` (The 'Where'): The platform or 'referrer'. Examples: `google`, `facebook`, `tiktok`, `klaviyo`.
• `utm_medium` (The 'How'): The general type of traffic. Examples: `cpc` (for paid ads), `social_organic`, `email`, `influencer`.
• `utm_campaign` (The 'Why'): The specific marketing effort. Examples: `summer_sale_2025`, `product_launch_shirt`, `welcome_email_flow`.

✅ Do's and ❌ Don'ts (The Golden Rules)

• Do: ALWAYS use lowercase. `Facebook` and `facebook` will show up as two different sources in your reports, breaking your data.
• Don't: NEVER use spaces. Use underscores `_` instead (e.g., `summer_sale`, not `summer sale`).
• Do: Be consistent. Always use `facebook`, not `fb` one day and `facebook.com` the next.
• Don't: Use UTMs on internal links on your own website. This will mess up your analytics. They are only for links *coming to* your site.

Real-Life Example:

You want to post a link to your new t-shirt in your Instagram bio. Your link should be:
yourstore.com/products/new-shirt?utm_source=instagram&utm_medium=social_organic&utm_campaign=profile_link