Duplicate Tags
Multiple GA4 config tags firing on the same page. Your session counts are inflated and every downstream metric is wrong.
Missing Conversions
Form submissions, purchases, or phone clicks not firing as conversion events. You're optimizing campaigns against incomplete data.
Orphaned Tags
Old pixels from previous agencies still firing on every page. Slowing your site down and leaking data to platforms you don't use.
Broken Cross-Domain
Checkout flows or subdomains splitting users into separate sessions. Your attribution model is fractured.
No Internal Filters
Employee traffic mixed into your reporting. Every time your team visits the site, it shows up as real engagement.
Event Parameter Gaps
Events fire but without the data you need. No form IDs, no product names, no transaction values. You can't segment any of it.