What's the difference between Consent Mode v2 Basic and Advanced?

In Basic mode, Google tags don't load until the user consents; if denied, zero data is sent. In Advanced mode, tags load immediately but in restricted mode: they send anonymous, non-identifying cookieless pings. These pings enable Google to perform advertiser-specific modeling.

Does banner design affect measurement loss?

Yes, design directly affects it. 'Button only' design yields 71-73% consent rate, while 'continue without agreeing' option reaches 79-80%. However, all options must have equal visibility for legal compliance.

Does KVKK exempt analytics cookies?

No. According to KVKK draft guidelines, only technically necessary cookies (login, cart) are exempt. Analytics cookies require explicit consent because they involve cross-site tracking and third-party data transfers. GA4 cannot benefit from the 'anonymous analytics' exemption because it sends data to Google.

Does server-side tracking eliminate consent requirements?

No. GDPR and KVKK regulate personal data processing regardless of method. Moving tracking server-side doesn't change the fact that data is being collected. IP addresses, user agents, and visit data are still personal data. Fines up to 20 million EUR or 4% of global turnover can apply.

Is part of the consent traffic drop caused by bot traffic?

Yes. In Basic mode, tags don't load without consent and bots can't click the banner, so bot traffic that was previously counted is automatically excluded. The reported drop after consent is a composite of real human loss and bot traffic that was previously inflating numbers.

You Added a Consent Banner, Your Traffic Dropped 30%: GDPR and KVKK's Impact on Measurement

TL;DR

With a legally compliant consent banner, up to 60% of visit data can be lost (etracker 2025). Consent Mode v2 Advanced mode sends cookieless pings enabling Google's behavioral modeling, but accuracy is around 70-80%. KVKK requires explicit consent for analytics cookies; GA4 cannot benefit from the exemption. Server-side tracking does not eliminate consent requirements. Consent also acts as an unintentional bot filter: in Basic mode, bots can't consent and are automatically excluded.

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