SEO Recap covering June 27, 2026: Google's spam update now targets AI answer manipulation

Daily summary of what matters in SEO, GEO, AEO, and AI search generated with Claude Code (beware of hallucinations)

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Generative Engine Optimization (GEO) & Answer Engine Optimization (AEO)

Google's June Spam Update Now Covers AI-Answer Manipulation, But Enforcement Is Hard
Source: Search Engine Journal

• Google's June spam update, the year's second, enforces its policy treating attempts to "manipulate generative AI responses" in Search as a violation.
• A Cornell Tech preprint, "Deep-Research Agents Can Be Poisoned via User-Generated Content," found ~13 words of planted text on a recurring community page inserted an attacker's chosen entity into finished reports in 38% to 51% of sessions. Spreading the text across several pages pushed that to 42% to 62%.
• User-generated platforms made up 17% to 23% of all URLs retrieved, with one page appearing in as many as 48% of sub-queries within a topic cluster. Tests ran on open-source agents STORM, Co-STORM, and OmniThink.
• Researchers tried 3 defenses (dropping user-generated sources, screening them with an LLM, and fact-checking the report) and none stopped the attack without degrading results.
• SE Ranking found Google self-citations rose to ~20% of AI Mode citations, and the piece notes brands have no dashboard to see whether they were cited or edged out of AI answers.