AI answer engines use semantic understanding, not keyword matching. They evaluate whether your content genuinely covers a topic with depth. Keyword stuffing that might have worked for old-school SEO actually hurts AI visibility because it signals low-quality content.
For a target keyword, 1-3% density is the natural range for well-written content. Below 1%, you might not rank for the term. Above 3%, both Google and AI engines may flag over-optimization. Write naturally and check the density after — don't optimize word by word.
AI engines understand synonyms and related concepts. Instead of repeating "AI visibility" 20 times, use variations: "AI search presence," "AI engine citations," "brand mentions in AI answers." This signals topical depth and reads naturally — both things AI engines reward.