programmatic-seo

Identify a repeatable keyword pattern, secure a data source that genuinely varies per page, then build a server-rendered generator using Express SSR routes, Next.js ISR, or Astro. Start with 10-20 high-quality pages, validate indexation, then scale what works.

Googlebot fetches raw HTML and does not reliably execute client-side JavaScript, so SPA routes render as an empty root div. Verify with curl, and move SEO pages to server-rendered routes such as Express HTML endpoints or Next.js SSR.

Use SSG for under 1,000 rarely-changing pages, ISR for 1,000-100,000 pages updated daily or weekly, and SSR or short-cache ISR for live data like prices or exchange rates. ISR is the common sweet spot for large page sets.

Thin content occurs when pages differ only by a swapped variable with identical boilerplate, offering no information gain over existing results. Google's scaled content abuse policy penalizes this pattern regardless of whether AI or humans wrote it.

Google limits each sitemap file to 50,000 URLs. Shard larger sets into multiple sitemap files referenced by a sitemap index, and generate them server-side from the database for ISR or SSR sites.

Avoid it when you lack genuinely different data per page variation, when your site has no topical authority in the subject, or when a single editorial page would serve the intent better. Auditing existing SEO issues and writing one-off posts need different approaches.