What does Google say about SEO? /
The Crawl & Indexing category compiles all official Google statements regarding how Googlebot discovers, crawls, and indexes web pages. These fundamental processes determine which pages from your website will be included in Google's index and potentially appear in search results. This section addresses critical technical mechanisms: crawl budget management to optimize allocated resources, strategic implementation of robots.txt files to control content access, noindex directives for page exclusion, XML sitemap configuration to enhance discoverability, along with JavaScript rendering challenges and canonical URL implementation. Google's official positions on these topics are essential for SEO professionals as they help avoid technical blocking issues, accelerate new content indexation, and prevent unintentional deindexing. Understanding Google's crawling and indexing processes forms the foundation of any effective search engine optimization strategy, directly impacting organic visibility and SERP performance. Whether troubleshooting indexation problems, optimizing crawl efficiency for large websites, or ensuring proper URL canonicalization, these official guidelines provide authoritative answers to complex technical SEO questions that shape modern web presence and discoverability.
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★★★ Do JavaScript links really need to be <a> elements with href to be crawled?
For Google to follow links generated by JavaScript, they must be genuine <a> elements with a valid href attribute. Buttons, divs, spans with onclick, or <a> tags without href or with empty href are no...
Martin Splitt May 27, 2020
★★★ Is dynamic rendering with expanded accordions considered cloaking by Google?
Serving Googlebot a version with expanded navigation accordions or without cookie banners via dynamic rendering is not considered cloaking, as long as the user is not misled about the main content. Th...
Martin Splitt May 27, 2020
★★★ Is it really true that JavaScript-rendered content can be indexed by Google without any friction?
If the content appears in the 'Rendered HTML' tab of testing tools (Mobile-Friendly Test, Rich Results Test, URL Inspection Tool), it is correctly indexable by Google, even if it is not in the origina...
Martin Splitt May 27, 2020
★★★ Should you really choose server-side rendering over dynamic rendering?
Google recommends server-side rendering over dynamic rendering because it creates faster sites for users. If implementation effort is required, it's better to favor the solution that also benefits use...
Martin Splitt May 27, 2020
★★★ Is the first wave / second wave model of JavaScript rendering still relevant?
The concept of 'first wave' and 'second wave' was a simplification to explain the crawling and rendering process. Google no longer uses it because it is misleading. The median time between crawling an...
Martin Splitt May 27, 2020
★★★ Should you stop using Google Cache to diagnose your indexing problems?
Google Cache is a fallback feature when a site is offline, created long ago and not actively maintained. It sometimes displays the original HTML, sometimes the rendering, and sometimes an old version....
Martin Splitt May 27, 2020
★★★ Should you really optimize your site for mobile-first indexing?
About 70% of all search results are indexed through mobile-first indexing. Google was expected to switch all sites in September 2020, but this date could change due to COVID-19. Search Console indicat...
John Mueller May 26, 2020
★★★ Should You Create Your XML Sitemap Manually or Use an Automated Tool?
John Mueller explained on Reddit that, for large-scale websites, creating XML Sitemap files manually is not recommended, but rather using a tool (plugin or otherwise) from the CMS being used......
John Mueller May 25, 2020
★★★ Will Google Penalize Your Pages After Removing a Noindex Tag?
John Mueller explained on Twitter that a page that was initially deindexed via a meta robots "noindex" tag and then had this tag removed at a later time returns to a "normal" indexation situation afte...
John Mueller May 25, 2020
★★★ Does Google really treat UGC just like your editorial content?
Google does not differentiate between content written by the site owner and that created by users (comments, discussions, complete pages). Any content published on a site is considered to be endorsed ...
John Mueller May 19, 2020
★★★ Should you block all UGC content from Google indexing by default?
To manage a large volume of user-generated content, Google recommends blocking these pages from indexing by default (via a noindex meta tag) and allowing them to be indexed only after validating their...
John Mueller May 19, 2020
★★★ Should You Noindex Your XML Sitemap to Optimize Crawl Budget?
Frédéric Dubut (Bing), followed by John Mueller (Google), explained on Twitter that there is absolutely no problem with setting an XML Sitemap file to "noindex" (via the HTTP header) and that the URLs...
John Mueller May 18, 2020
★★ Should You Serve Lightweight Pages to Bots to Enhance Performance?
It is not recommended to serve bots pages without webfonts to gain performance. The added complexity (bot detection, extra code, potential bugs) far exceeds the minimal benefit. It is better to block ...
Martin Splitt May 18, 2020
★★★ How can you effectively manage 404 errors in a SPA without risking deindexation?
For SPAs with client-side routing, Google recommends three solutions to signal a 404 error: redirect to a server URL with a 404 code, add a noindex tag, or use a soft 404 (automatically detected but l...
Martin Splitt May 18, 2020
★★★ Why is Googlebot missing your content loaded by Web Workers?
Googlebot does not handle Web Workers perfectly, particularly asynchronous streams. If a worker loads data asynchronously, it does not work reliably. Google is working to improve this support but reco...
Martin Splitt May 18, 2020
★★ Does dynamic rendering really slow down your server or enhance your crawl budget?
Dynamic rendering generally takes more time on the server side because an additional rendering step is added. However, it can save client-side API requests and potentially increase the crawl budget fo...
Martin Splitt May 18, 2020
★★★ Can Googlebot really crawl hidden links in a hamburger menu?
If a mobile navigation only appears in the DOM after user interaction (clicking on the hamburger), Googlebot will not see these links. The links must be present in the DOM, even if they are visually h...
Martin Splitt May 18, 2020
★★★ Is it true that hidden content in accordions is actually indexed by Google?
Content hidden behind accordions or tabs is indexable by Google as long as it is present in the DOM, even if it is invisible. However, the main content should not be hidden behind user interaction, an...
Martin Splitt May 18, 2020
★★★ Is dynamic rendering really risk-free for SEO?
Serving identical or similar content to bots without JavaScript is not seen as cloaking. If the content varies slightly, it is dynamic rendering, which is perfectly acceptable according to Google....
Martin Splitt May 18, 2020
★★ Can you really block Googlebot state by state in the U.S. without breaking everything?
If you need to block certain U.S. states (not the entire country), you can block Googlebot based on the IP geolocation of the state, but it's technically challenging because the state-IP mapping is no...
John Mueller May 15, 2020
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