The effectiveness of schema types can vary by industry and content type, but some universally impactful ones include Product (with offers and pricing), Review/Rating, Event (for events listings), Breadcrumbs (for improved navigation visibility), FAQPage (for direct answers in search results), HowTo (for step-by-step guides), and Article/NewsArticle schemas. These markups increase the chances that additional details appear in search results which improves CTR by making listings more attractive.