Consent Mode Basic vs Advanced
Data & TrackingAlso: Google Consent Mode · Basic Consent Mode · Advanced Consent Mode
Quick definition
Consent Mode is Google's framework for adjusting how tags like Google Analytics and Google Ads behave based on a visitor's cookie consent. Basic mode blocks tags completely until consent is granted. Advanced mode still fires tags without cookies, sending anonymous modelled pings that Google uses to estimate conversions.
How it varies across Australia
Australian sites running Advanced mode typically retain a noticeably larger share of measurable conversions than sites on Basic mode, because the modelled pings fill gaps left by consent refusals. The gap widens on sites where consent rates sit lower, which tends to be the case in categories with more cautious audiences.
See data and tracking benchmarks across Australian industries →Basic vs Advanced, side by side
Tags don't fire at all until the visitor consents. Simplest to set up, but every refusal is a total data gap.
No data before consentTags still fire without cookies, sending anonymous signals Google uses to model the missing conversions statistically.
Modelled data before consentWhat it actually means
Picture a bouncer at a door. Basic Consent Mode is the bouncer who won't let anyone in until they show ID. No ID, no entry, no record they were ever there. Advanced Consent Mode is the bouncer who still notes that someone walked past, roughly what they looked like, without ever checking ID. Nothing personal gets recorded, but Google Ads and Google Analytics 4 (GA4) can still estimate what happened using statistical modelling.
Both modes exist because of consent banners required under privacy rules like the General Data Protection Regulation (GDPR) in Europe. When a visitor declines cookies, standard tags like the Google tag or Google Tag Manager (GTM) pixel would normally go silent. Basic mode accepts that silence. Advanced mode fills part of the gap with modelled pings, which Google's machine learning uses to estimate conversions that consent-based tracking alone would miss.
The practical difference shows up in your reporting, not your compliance risk. Both modes are compliant when implemented correctly. The real decision is how much data completeness you're willing to trade for setup complexity, and how comfortable your organisation is with modelled numbers standing in for actual first-party data.
Basic mode respects a no. Advanced mode respects a no and then quietly asks the question again in aggregate.
How it shows up
It shows up as a visible dip in GA4's conversion count the moment a consent banner goes live, then a partial recovery once modelling kicks in under Advanced mode. In Basic mode, that dip stays permanent and scales with your refusal rate. You'll also see it in Google Ads as 'modelled conversions' appearing in reporting, a category that only exists because Advanced mode is feeding the platform anonymous signal it can extrapolate from.
The Australian context
Australia doesn't have a direct equivalent to GDPR consent requirements, but the Privacy Act reforms are moving in that direction and many Australian businesses run global tag setups that inherit EU consent logic regardless. Sites serving European visitors, or businesses using platforms built for global compliance by default, often end up running Consent Mode whether or not local law strictly demands it.
The practical upshot for Australian marketers is that Consent Mode decisions are frequently made by whoever built the tracking stack originally, not by anyone weighing the data tradeoff on purpose.
Where people get this wrong
Related terms
Common questions
Do I need Advanced Consent Mode if I use Basic mode already?
Not legally, but you're leaving measurement value on the table. Advanced mode recovers a meaningful share of conversions that Basic mode simply discards when visitors decline cookies. If reporting accuracy matters to your budget decisions, it's worth the extra setup.
Is Advanced Consent Mode less private than Basic mode?
No. Advanced mode never collects personal data or cookies from visitors who haven't consented. It sends anonymous, aggregated signals that Google models statistically. The privacy protection is the same, the difference is purely in how much Google can estimate afterward.
Will switching modes affect my historical GA4 data?
Your historical data stays as it was recorded. What changes going forward is how conversions from non-consenting visitors get counted, with Advanced mode adding modelled conversions that Basic mode never generates. Expect a visible shift in trend lines around the switch date.
Does Consent Mode apply outside Google's tools?
Consent Mode specifically governs Google tags, including Google Analytics, Google Ads and Floodlight. Other platforms like Meta or LinkedIn have their own separate consent frameworks that need to be configured independently through your tag manager or data layer.
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About New Rebellion
New Rebellion is a marketing intelligence consultancy. We build tools, score Australian businesses on how their marketing actually performs, and publish Debrief every day. This dictionary is part of how we work in the open.
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