Learn how you can use a sitemap and other methods to tell Google about all of the different language and regional versions of your pages.| Google for Developers
Get an in-depth understanding of how Google Search works and improve your site for Google's crawling, indexing, and ranking processes.| Google for Developers
The spam policies detail the behaviors and tactics that can lead to a page or an entire site being ranked lower or completely omitted from Google Search.| Google for Developers
When a site has duplicate content, Google chooses the canonical URL. Learn more about canonical URLs and how to consolidate duplicate URLs.| Google for Developers