Google's AI Overviews visibility drops from 84% to 15%.
Started mid-April, continued post-official launch in the U.S.
AI Overviews and featured snippets show 195% co-occurrence likelihood.
Healthcare maintains presence; Restaurants and Travel see declines.
Google aims to reduce repetitive content, improve user experience.
Optimism remains for AI's transformative potential in search.
Healthcare benefits; other sectors must adapt SEO strategies.
Businesses must diversify SEO for various search features.