Check the link first
- Open the live ad's link. Are the source, medium and campaign values there, spelled as in your standard?
- Look for a different value in the ad platform's own parameters, which can overwrite or duplicate yours.
Check what happens to the link
- Redirects that drop the query string, such as a redirect from a short link or from the non www address.
- Link shorteners and tracking wrappers that rebuild the address.
- A cookie banner or a consent tool that delays the analytics tag until after the parameters are gone.
Check the checkout
- Payment providers that send customers back to the store from another domain and start a new session.
- Domains that are not in the cross domain list of your analytics.
Check how it is read
- Case: the same channel can appear under several spellings. Keep one lowercase standard.
- The report you are looking at: a default channel grouping can place correctly tagged traffic somewhere unexpected.
Fix and record
- Fix links in a batch and write the date in the change log, so the break in the series is explained.










