Direct Answer
A cookie banner is the consent prompt asking visitors to accept tracking cookies. Required under GDPR (EU), UK GDPR, CCPA (California), and Quebec's Law 25. If you serve any traffic from those jurisdictions — most U.S. service businesses do — you need one. Use Cookiebot, OneTrust, or open-source alternatives like Klaro.
Voice answer (≤30 words)
“A cookie banner is the tracking consent prompt. You need one if you serve traffic from the EU, UK, California, or Quebec.”
Default to 'no tracking' — opt-in compliance is the conservative legal standard.
Block third-party scripts (Meta Pixel, Google Ads remarketing) until consent — non-blocking banners are non-compliant.
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