In short
Next.js's built-in API — the `metadata` export or `generateMetadata` function — for setting a page's title, description and Open Graph tags for SEO.
How to learn this
- 1Add a static `metadata` export to a page with title and description.
- 2Use `generateMetadata` for a dynamic route where the title depends on fetched data.
- 3Verify your metadata renders correctly using a social-share debugger tool.
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