https://developers.google.com/webmasters/mobile-sites/mobile-seo/common-mistakes/unplayable-content,Unplayable content,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://www.lynda.com/WordPress-tutorials/WordPress-Plugins-SEO/140779-2.html,WordPress Plugins: SEO,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://support.google.com/webmasters/answer/6082207,Mobile sitemap,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://developers.pinterest.com/rich_pins/validator/,Pinterest,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://www.lynda.com/Google-Maps-tutorials/SEO-Local-Visibility/178132-2.html,SEO for Local Visibility,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://www.similarweb.com/,SimilarWeb,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 403: 'Forbidden'> | reason: Forbidden
https://support.google.com/webmasters/answer/1663744,Pagination,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://twkm.ca/projects/seo-bookmarklet,SEO Bookmarklet,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: URLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1123)')) | reason: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1123)
https://developers.google.com/webmasters/mobile-sites/mobile-seo/common-mistakes/slow-mobile-pages,Performance,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://developers.google.com/webmasters/structured-data/customize/social-profiles,Social Profiles,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://www.lynda.com/Buzzstream-tutorials/SEO-Tools-Fundamentals/368917-2.html,SEO Tools Fundamentals,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
http://tools.seochat.com/tools/search-spider-simulator,Search Engine Spider Simulator,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://www.lynda.com/Business-Online-Marketing-tutorials/SEO-Keyword-Strategy-Depth/147030-6.html,SEO: Keyword Strategy in Depth,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://www.lynda.com/HTML-5-tutorials/Improving-SEO-Using-Accessibility-Techniques/89051-6.html,Improving SEO Using Accessibility Techniques,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://www.lynda.com/Business-Online-Marketing-tutorials/SEO-Link-Building-Depth/95253-6.html,SEO: Link Building in Depth,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://www.lynda.com/Analytics-tutorials/International-SEO-Fundamentals/377449-6.html,International SEO Fundamentals,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://www.lynda.com/Marketing-PPC-tutorials/Spying-SEO-Tools/371730-6.html,Spying with SEO Tools,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 404: 'Not Found'> | reason: Not Found
http://seoforbeginners.com/,SEO for Beginners,https://github.com/marcobiedermann/search-engine-optimization#readme,Search Engine Optimization error: <HTTPError 501: 'Not Implemented'> | reason: Not Implemented