Technical SEO Part 2. – What Does Technical SEO Include? Technical SEO comprises optimization of the robots.txt file, the XML sitemap, the website architecture, broken links, structured data, mobile-friendly design, HTTPS, duplicate content, URL structure, hreflang, 301 redirects, 404 errors, and duplicate content. SEO Crawling To have a search engine like Google recognize your web pages and display them in the search results, crawling is the first step. Robots, usually