What does Google say about SEO? /
Domain age and historical factors remain hotly debated topics in the SEO community. This category compiles Google's official statements regarding how domain age, history, and accumulated reputation influence search rankings. SEO professionals frequently question whether the sandbox effect truly exists for new websites, whether older domains hold inherent advantages, and how a site's history impacts current performance—including previous ownership changes, past penalties, and archived content. Google representatives have consistently addressed these concerns, particularly regarding the concept of trust built over time. Understanding these official positions helps practitioners separate persistent myths from actual ranking factors recognized by Google's algorithms. This knowledge proves invaluable when acquiring expired domains, conducting site migrations, or implementing rebranding strategies where historical signals can significantly impact future SEO performance. These declarations provide clarity on what truly matters: quality content and user experience rather than mere domain age, helping SEO specialists make informed strategic decisions based on verified information rather than speculation or outdated assumptions about temporal ranking factors.
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★★★ Should you really fix all the errors in your robots.txt file?
Google ignores unknown directives and UTF-8 coding errors in the robots.txt file....
John Mueller Aug 25, 2015
★★★ Should you block filter pages with robots.txt or focus on canonicalization?
For e-commerce sites with filters, it is recommended to use canonicalization or no-index rather than blocking with robots.txt....
John Mueller Aug 25, 2015
★★★ Can Google really index your pages without crawling them?
Google can index a URL even if it has not crawled it, based on external links and anchor text, but without a content snippet....
John Mueller Aug 25, 2015
★★★ How does blocking URLs in robots.txt dilute the PageRank of your backlinks?
The robots.txt file should not be used to address canonical issues, as links lose their PageRank when pointing to a URL blocked by robots.txt....
John Mueller Aug 25, 2015
★★ Deep Links: Do you really need to choose between HTTP schema and custom schema?
Google recommends using either an HTTP schema or a custom schema for deep links. With the HTTP schema, already indexed URLs will be automatically validated. With a custom schema, each page must be ann...
Krzysztof Bielski Aug 25, 2015
★★★ Can you really launch a 100% mobile site without a desktop version and still rank on Google?
A website can be exclusively mobile without needing a desktop version. It will still appear in search results, but it also needs to be functional on desktop browsers, even if the display differs....
John Mueller Aug 14, 2015
★★★ Should you really use a 404 for pages with no search results?
John Mueller advises returning a 404 code for pages that contain no content, so that they are removed from Google's index once they are crawled again. If a 404 is not possible, a 'noindex, nofollow' t...
John Mueller Aug 14, 2015
★★★ Do nofollow links really hurt your SEO?
Nofollow links do not pass PageRank. Their presence does not mean a site is of poor quality and does not have a negative effect on ranking. They simply inform Google that a link should not be consider...
John Mueller Aug 14, 2015
★★ Does HTTP caching really affect your ranking in Google?
The duration of HTTP caching rules has no direct impact on search engine ranking. However, it may affect how frequently Googlebot updates cached pages....
John Mueller Aug 14, 2015
★★★ Why does Googlebot stubbornly recrawl your 404 pages?
Pages returning a 404 code can be recrawled from time to time by Googlebot, especially if new links to these pages appear. This is done to check if they exist again, as they may return one day....
John Mueller Aug 14, 2015
★★ Why does Google still display the old domain months after a migration?
After a domain change, even with 301 redirects, it may take several months for Google to stop displaying the old domain in specific queries related to the old site....
John Mueller Aug 11, 2015
★★★ Does Google really index JavaScript just like classic HTML?
Google treats JavaScript-generated content in the same way as classic HTML content if Googlebot can crawl all the necessary JavaScript resources for rendering the page....
John Mueller Aug 11, 2015
★★★ Do URL parameters in the Search Console really work the way people think?
Using parameters in Google Search Console is a way to guide Google on how to handle these URLs. However, it's not a definitive rule. If pages cause a high server load, it's better to use a robots.txt ...
John Mueller Aug 11, 2015
★★ Are translations truly free from penalties for duplicate content?
Content translations are not considered duplicate content. Google treats translated versions as distinct and can use hreflang to adjust the display according to the user's language....
John Mueller Aug 11, 2015
★★★ Should you block a page with a canonical tag in robots.txt?
For Google to respect rel=canonical tags, it must be able to crawl the page with that tag. If a page is blocked by robots.txt, Google won't see the tag and cannot merge the signals from the pages....
John Mueller Aug 11, 2015
★★ Should you redirect your doorway pages with a 301 or deindex them with noindex?
Doorway pages can be redirected with 301 if you want to merge the content. A noindex tag can also be used if you prefer to keep them accessible but invisible to search....
John Mueller Aug 11, 2015
★★★ Should you really invest in an Extended Validation SSL certificate for SEO?
Google makes no distinction between standard SSL certificates and Extended Validation certificates in terms of ranking. What counts is that the certificate is valid and uses modern encryption standard...
John Mueller Aug 11, 2015
★★★ Do user comments really harm your SEO?
User comments can enhance a page if their quality is high. However, a large number of low-value comments can dilute the perceived quality of the page content....
John Mueller Jul 31, 2015
★★★ Why does Google require access to your CSS and JavaScript files for mobile ranking?
In order to determine if a site is mobile-friendly, Google must have access to the CSS and JavaScript files. This allows it to recognize aspects such as mobile compatibility and offer ranking benefits...
John Mueller Jul 31, 2015
★★ Do 302 redirects really cause a loss of PageRank?
Google primarily distinguishes between permanent (301) and temporary (302) redirects. Temporary redirects may be treated as permanent if they appear so, but they do not pose a problem of PageRank loss...
John Mueller Jul 31, 2015
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