The document provides information on best practices for url structure, status codes, 301 redirection, custom 404 pages, breadcrumb navigation, web content optimization, internal and external links, sitemaps, and robots.txt files. Key recommendations include using hyphens in urls, not using special characters, backing up existing urls before changing, understanding common status codes, using 301 redirection for domain changes or folder moves, creating custom 404 pages, implementing breadcrumb navigation, optimizing content for keywords and plagiarism, checking for duplicate content, creating internal and footer links to targeted keywords, generating sitemaps to help search engine indexing, and using robots.txt to allow search engine crawling.
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