Next.js provides the best SEO capabilities of any React framework through server-side rendering, metadata API, and built-in optimizations. Proper configuration is essential to realize these benefits.
Metadata API: Next.js App Router provides generateMetadata for dynamic meta tags. Define title, description, Open Graph, and Twitter cards per page. Metadata flows through the layout hierarchy.
Sitemap generation: create a sitemap.ts file in your app directory to generate dynamic XML sitemaps. Include all important pages with lastModified dates. Submit to Google Search Console for faster indexing.
Structured data: implement JSON-LD schema markup using script tags in page components. Product pages need Product schema, articles need Article schema, and organization pages need Organization schema.
Rendering strategy selection impacts SEO: use SSG for content pages (fastest, best for SEO), SSR for dynamic content (real-time data), and ISR for pages that change periodically (balance of performance and freshness).
Open Graph optimization: set og:title, og:description, og:image, and og:type for rich social sharing previews. Use the opengraph-image convention to generate OG images dynamically.
Canonical URLs: prevent duplicate content issues by setting canonical URLs for each page. Next.js can generate these automatically through the metadata API or alternates configuration.
URL structure: use clean, keyword-rich URLs. Next.js file-based routing makes this natural. Avoid parameter-heavy URLs and implement proper 301 redirects for URL changes in next.config.js.
Performance for SEO: Next.js Image component optimizes images automatically. Font optimization reduces layout shifts. Code splitting reduces initial bundle size. All contribute to better Core Web Vitals.
Robots.txt configuration: create a robots.ts file for dynamic robots.txt generation. Block admin pages, API routes, and search results pages from crawling while allowing access to all valuable content.
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