Organic Traffic
In one line
Organic traffic is the share of visitors who arrive from unpaid search results — the baseline metric most teams use to judge whether SEO is actually working for them.
Going deeper
Organic traffic is everyone who lands on your site from unpaid search results on Google, Naver and the rest. The headline difference from paid search is simple — you do not pay per click — and that changes how you should think about its ROI.
Most teams just read it off GA4's 'Organic Search' channel, but a growing number now split AI-driven referrals (ChatGPT, Perplexity, Copilot) into their own channel so they can judge GEO performance separately from classic SEO.
A drop in organic traffic does not automatically mean SEO is broken. With AI Overviews and zero-click results on the rise, you often see fewer clicks but higher conversion rate per visit — so always read traffic alongside conversions and revenue, not on its own.
Related terms
Organic Search
Organic search is the unpaid portion of a search results page — the listings that don't carry an 'Ad' label, and the surface SEO and GEO actually compete on.
GEO·AEOAI Referral Traffic
AI Referral Traffic is the visit traffic to your site whose referrer is an AI tool — ChatGPT, Perplexity, Gemini — typically split out as its own channel in GA4 and similar tools.
GEO·AEOZero-Click
Zero-click search is the behaviour where a user finds what they need inside the search interface itself and ends the session without clicking any result.
MarketingGA4
Google Analytics 4 (GA4) is Google's current analytics platform for web and app, built on an event-based data model rather than the session-centric model that defined Universal Analytics.
MarketingCTR
Click-through rate (CTR) is the share of impressions that resulted in a click — the most basic measure of how compelling an ad, link or search result is.
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