Google can discover pages through internal links and external backlinks without an XML sitemap, so technically you can rank without one. Small sites with strong internal linking and regular content updates may never notice a difference. That said, submitting a sitemap to Google Search Console remains standard practice because it removes guesswork from the crawl process and gives you diagnostic data. XML sitemaps are most valuable when your site has poor internal linking structure, new pages that haven't been linked to yet, or pages buried four-plus clicks deep from the homepage. E-commerce sites with thousands of product pages, news sites publishing dozens of articles daily, and large corporate sites with siloed sections all benefit from explicit page lists. The sitemap tells Google exactly what exists and when it was last modified, which speeds up discovery of new or updated content. A sitemap also provides crawl signals through priority and changefreq attributes, though Google treats these as hints rather than commands. More importantly, Search Console's sitemap reports show submitted versus indexed page counts—if you submit 800 pages but only 200 get indexed, that's a clear signal of quality or technical issues you need to investigate. At Ottawa SEO, we generate sitemaps for every client site regardless of size. The setup cost is near zero with modern CMS platforms—WordPress plugins, Shopify's native generator, or serverless functions for static sites handle it automatically. We exclude low-value pages like thank-you pages, filtered URLs, and pagination to keep the sitemap focused on indexable content. Skip the sitemap only if you're running a simple five-page brochure site with perfect internal linking and minimal updates. For everyone else, the diagnostic value alone justifies the fifteen minutes of setup. It won't rescue a site with fundamental crawl issues, but it removes one variable from the indexing equation and gives you measurable data about Google's behavior.