SEO (Search Engine Optimization) optimizes for traditional search engines like Google and Bing where ranking on result pages drives clicks. AEO (Answer Engine Optimization) optimizes for AI answer engines like ChatGPT, Claude and Perplexity where citation inside generated answers drives visibility. The technical foundation overlaps by roughly 70 percent; the surface tactics and KPIs differ.
SEO measures keyword rankings, organic traffic and click-through rate. AEO measures citation frequency, share of voice in answer engines and the accuracy of brand descriptions. A site can be ranking number one in Google and still be invisible in ChatGPT, and vice versa.
SEO leans on technical SEO, backlink building, keyword-optimized content and Core Web Vitals. AEO adds llms.txt files, AI Instructions pages, entity strengthening on Wikipedia and Wikidata, citation harvesting on Reddit and Stack Exchange and answer-pattern content engineering.
Schema markup, internal linking, content quality and topical authority serve both disciplines. A combined retainer compounds the foundation work. Spacemen Digital structures all engagements this way.
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