---
type: Index
title: Concepts & definitions
description: Definitions of the core concepts a tracking audit works with, from Consent Mode v2 to transaction de-duplication.
resource: https://www.trackingauditor.io/google-analytics-audit
tags: [definitions, tracking-audit]
timestamp: 2026-07-04T09:00:00Z
---

# Concepts & definitions

The vocabulary of a tracking audit, one concept per file.

## Consent & cookies

- [Consent Mode v2](/okf/concepts/consent-mode-v2.md)
- [Consent management platform (CMP)](/okf/concepts/cmp.md)
- [Strictly necessary cookies](/okf/concepts/strictly-necessary-cookies.md)

## Tag management

- [GTM container](/okf/concepts/gtm-container.md)
- [dataLayer](/okf/concepts/datalayer.md)
- [Measurement ID](/okf/concepts/measurement-id.md)

## GA4

- [GA4 key events](/okf/concepts/ga4-key-events.md)
- [Enhanced measurement](/okf/concepts/enhanced-measurement.md)
- [Internal traffic filter](/okf/concepts/internal-traffic-filter.md)
- [GA4 data retention](/okf/concepts/data-retention.md)

## Attribution & conversions

- [Transaction de-duplication](/okf/concepts/transaction-deduplication.md)
- [Unassigned traffic](/okf/concepts/unassigned-traffic.md)
- [Referral exclusions](/okf/concepts/referral-exclusions.md)
- [Cross-domain tracking](/okf/concepts/cross-domain-tracking.md)

## Debugging

- [GTM Preview & GA4 DebugView](/okf/concepts/debugging-tools.md)