Direct answer
Consent and tracking controls change observed data. Good analysis documents coverage, avoids collecting unnecessary values and keeps the product functional when analytics is absent.
Practical steps
- Classify essential and optional processing.
- Minimize event properties.
- Activate optional analytics only after valid consent.
- Interpret trends with known coverage changes.
Common mistakes
- Blocking site function without analytics.
- Sending form or tool inputs as event properties.
- Treating tracked users as the whole audience.
Limitations
- Consent rules vary by jurisdiction.
- Observed conversion rates reflect measurement coverage.
Primary sources
- Web Content Accessibility Guidelines (WCAG) 2.2 — W3C; 2024-12-12; 2026-08-14.