Why UTM Data Gets Split into Multiple Rows

Analytics platforms group traffic by the exact values they receive. A change in capitalization, spelling, separator, or campaign name can create a separate row.

Typical examples

• Facebook versus facebook.
• paid-social versus paid_social.
• newsletter versus email_newsletter.
• summer_sale versus summer-promotion.

How to prevent fragmentation

1. Define an approved source and medium vocabulary.
2. Use lowercase values.
3. Choose one separator.
4. Use a stable campaign naming pattern.
5. Validate links before publishing.

Do not try to fix historical data only by changing future links. Record the old values and decide how they should be grouped when reporting.

Use the BestUTM builder and a written naming convention to keep new campaign links consistent.

Fix the process, not only the report

A report filter can group old values temporarily, but it does not prevent new variants from appearing tomorrow. Create a short approved vocabulary, put it in the campaign template, and review links before publication.

When historical values cannot be changed, keep a mapping document that explains which old values represent the same intended channel.

A repeatable review process

Review the link before publishing, immediately after it goes live, and again when the campaign report is first checked. These three moments catch different problems: naming errors, redirects or page issues, and unexpected reporting behavior.

Write down the correction instead of fixing one URL silently. A short record helps the whole team avoid repeating the same mistake in the next campaign.

Audit before a major campaign

Before a seasonal sale or product launch, search the existing library and reports for variants of your planned source and campaign names. Finding paid-social and paid_social before launch is much cheaper than reconciling them afterward.

Give one person ownership of the naming convention when several agencies or departments create links.