Google's John Mueller shares a variety of best practices and tackles myths and misconceptions related to web development and SEO in the "English Google Webmaster Central office-hours hangout." He stresses the importance of using fast and reusable technologies, using sitemaps to notify Google of new and updated URLs, avoiding robots.txt to eliminate duplicate content and how to handle duplicate content using the parameter handling tool, and upholding website design best practices such as avoiding blocking CSS and JS resources. He also emphasizes the value of creating unique content, improving mobile access, and user feedback. Mueller also discusses the limited submissions of Fetch as Google and advises on where to upload RSS feeds. Lastly, he sheds light on why sitemaps aren't prioritized by Google and advises on how to rank better through creating useful and timely content.
In a recent Google Webmaster Central office-hours hangout, John Mueller shared his advice on properly using hreflang in canonical URLs. He suggests connecting the canonical URLs with hreflang and using the version of the site being picked up for indexing for the hreflang parameter if there are multiple versions of the site. He also offers to review sites to help resolve any hreflang or canonical issues, and suggests rolling back any moves to HTTPS if there are any concerns or issues.