Data quality issues in Google Analytics 4 occur when the information in your reports doesn’t match the reality of your business. This often stems from “data fragmentation,” where user journeys are cut short by cookie expiration or privacy settings. Common symptoms include inflated session counts, missing referral sources, or “unassigned” traffic.

To solve these GA4 data quality issues, businesses are increasingly moving toward server-side tracking. By processing data on a private server before sending it to Google, you can clean up “noise,” validate events in real-time, and ensure that your marketing decisions are based on a single, high-quality source of truth rather than a broken digital traila