Page speed, mobile responsiveness, crawl errors, XML sitemap, duplicate content, SSL/HTTPS, URL structure, hreflang, schema markup, and image optimization are crucial factors for a website's success. Google rewards a good loading time of 2 seconds or less. XML sitemaps make websites user-friendly, while 301 redirects or noindex redirects can improve search engine rankings. Using hyphens, optimizing hreflang, and boosting content globally can also improve website ranking.