How to Implement SEO with Next.js 15 and Sitemap 4.0 for E-Commerce Sites with 10k Products E-commerce sites with 10,000+ products face unique SEO challenges: scaling metadata, avoiding duplicate content, ensuring fast indexation of new products, and maintaining Core Web Vitals performance. Next.js 15’s App Router, Metadata API, and Partial Prerendering paired with Sitemap 4.0’s dynamic generation capabilities solve these pain points for large-scale stores. Prerequisites Before starting, ensure you have: An existing Next.js 15 project (App Router enabled by default) Sitemap 4.0 installed via npm install sitemap@4 A product data source (headless CMS, PostgreSQL, MongoDB, etc.) with 10k+ product records Basic knowledge of Next.js App Router and SEO fundamentals Step 1: Configure Per-Page Metadata with Next.js 15 Metadata API Next.js 15’s Metadata API lets you define static or dynamic metadata for every page, critical for product pages that need unique titles, descriptions, and canonical URLs.…