E-commerce SEO decides whether an online shop gets found – or disappears into the digital shelf. Unlike classic content websites, e-commerce SEO is not just about who writes the best copy. It is about who structures product data most cleanly, delivers it technically sound, and covers search intent across category, product, and filter pages. On top of that, search behavior is changing through AI-powered answer systems – both inside Google itself and on platforms like ChatGPT or Perplexity. This guide covers what actually moves the needle: on-page SEO, product pages, category pages, technical SEO, structured data, and the foundation of every successful e-commerce SEO – product data itself.