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In 2026, 68% of global Google searches become zero‑click, 77.2% on mobile. Traditional #1 SERP CTR crashes from 28% to 9%. GEO (Generative Engine Optimization) shifts focus from chasing blue‑link rankings to becoming cited source for ChatGPT, Gemini, Perplexity and Copilot. This article covers Hong‑Kong market statistics, major Google algorithm updates 2026, four AI‑engine citation mechanics, GA4 / GSC key metrics, GEO case study and actionable 4‑step GEO implementation playb