Next.js 15 SEO: metadata, OG Images, Sitemap, and Structured Data (2026)

Short summary

Next.js 15 App Router provides complete SEO tooling: static metadata exports, dynamic metadata via generateMetadata() for route params, automatic OG image generation, XML sitemaps, and robots.txt. The guide covers production patterns including metadata templates, per-page dynamic images, structured JSON-LD data, and common mistakes like unvalidated schema. Use React's cache() to prevent redundant DB calls when generateMetadata and page components fetch identical data.

• •Static metadata + dynamic generateMetadata for route params
• •Automatic OG image generation and social sharing optimization
• •Complete structured data (JSON-LD) with validation patterns

Generated with AI, which can make mistakes.