A sitemap provides information that helps Google more intelligently crawl your site. Discover how a sitemap works and determine if you need one.| Google for Developers
See how different HTTP status codes, and network and DNS errors can affect Google Search. Learn how to debug network and DNS errors.| Google for Developers
Learn how to create and submit a News sitemap by reviewing the requirements, example entries, and news-specific tag definitions.| Google for Developers
XMLHttpRequest (XHR) objects are used to interact with servers. You can retrieve data from a URL without having to do a full page refresh. This enables a Web page to update just part of a page without disrupting what the user is doing.| MDN Web Docs
A robots.txt file lives at the root of your site. Learn how to create a robots.txt file, see examples, and explore robots.txt rules.| Google for Developers
Discover what Google mobile-first indexing is and explore best practices designed to improve user experience in Google Search.| 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
Google crawlers discover and scan websites. This overview will help you understand the common Google crawlers including the Googlebot user agent.| Google for Developers
The Hypertext Transfer Protocol (HTTP) is a stateless application-level protocol for distributed, collaborative, hypertext information systems. This document describes the overall architecture of HTTP, establishes common terminology, and defines aspects of the protocol that are shared by all versions. In this definition are core protocol elements, extensibility mechanisms, and the "http" and "https" Uniform Resource Identifier (URI) schemes. This document updates RFC 3864 and obsoletes RFCs 2...| www.rfc-editor.org
Google uses links as a signal when determining the relevancy of pages and to find new pages to crawl. Learn how to make your links are crawlable and improve your anchor text.| 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
Google supports several sitemap formats. Follow this guide to learn about formats, how to build a sitemap, and how to submit a sitemap to Google.| Google for Developers