What does Google say about SEO?

Why do your rankings fluctuate after each core update without being penalized?

Google Jan 04, 2019 ★★

Core updates can correct rankings that were unjustly affected by previous updates. The fact that certain pages are impacted does not necessarily mean a penalty but rather a reevaluation against new standards.

Algorithms Domain Age & History AI & SEO Search Console

Are directories really beneficial for SEO in 2025?

Google Jan 04, 2019 ★★★

Listing a site in only quality directories is beneficial. However, listing a site in low-quality directories or paying for listings can harm SEO.

AI & SEO

Will Google refuse to index your content if too many pages already cover the same topic?

John Mueller Dec 31, 2018 ★★★

John Mueller explained on Twitter that Google crawls and indexes content on a given topic, even if the search engine already has numerous pages covering this topic extensively in its index. No matter what, a new page on the same topic will be taken i...

Domain Age & History Content Crawl & Indexing Discover & News AI & SEO Social Media

How Many People Actually Work on Google's Search Algorithm?

Google Dec 31, 2018 ★★

Sundar Pichai, Google's CEO, indicated during his testimony before the US Congress that currently, approximately one thousand people work on "core search," the heart of the search engine, within the Mountain View firm. However, he did not specify wha...

Algorithms Content AI & SEO

Do You Really Need a Trailing Slash at the End of Your Homepage URL?

John Mueller Dec 31, 2018 ★★★

John Mueller answered a question on Twitter about the slash ("/") at the end of a website's domain name: is it implicitly taken into account or not? In other words, is the address https://www..com (without /) equivalent to https://www..com/ (with /)?...

Content HTTPS & Security AI & SEO JavaScript & Technical SEO Domain Name Social Media

Should You Optimize the Max-age Parameter for CSS and JavaScript Files for SEO?

John Mueller Dec 31, 2018 ★★★

John Mueller also indicated on Twitter that the search engine does not take into account the "Max-age" parameter (notably used for cache systems) of JavaScript or CSS files...

Domain Age & History Content AI & SEO JavaScript & Technical SEO PDF & Files Web Performance Social Media

Should You Really Ignore Negative SEO Like Google Recommends?

John Mueller Dec 24, 2018 ★★

According to John Mueller, Negative SEO is a waste of time and this concept doesn't exist. When asked "How can we be safe from negative SEO?" on Twitter, John replied: "You can just ignore it."

Content AI & SEO JavaScript & Technical SEO Domain Name Penalties & Spam Social Media

Should You Really Abandon Technical Tag Optimization After a Google Penalty?

John Mueller Dec 24, 2018 ★★

John Mueller indicated on Reddit, regarding the Medic update of August 1st, that the work to be done if your site was impacted by this update was primarily to work in a general and macroscopic way on the quality of your site, and not, in a granular w...

Content AI & SEO PDF & Files

Does Google Actually Count Links Passed Through iFrames for SEO?

John Mueller Dec 24, 2018 ★★

John Mueller responded on Twitter to a question about iframes: when page A contains an iframe B that contains a link to C, can we say that, for Google, A links to C? John explains that this type of situation can be interpreted differently by Google a...

Domain Age & History Content AI & SEO Links & Backlinks Social Media

Are image sitemaps really necessary for indexing?

John Mueller Dec 21, 2018 ★★★

Google detects images from the code, but an image sitemap explicitly signals their importance for indexing. Its relevance depends on your desire to index images, especially if they are frequently searched.

Domain Age & History Crawl & Indexing AI & SEO Images & Videos Search Console

What image size does Google actually prioritize in image search?

John Mueller Dec 21, 2018 ★★★

Google generally chooses high-resolution images for image search to provide good visual quality, but it is not necessary to upload excessively large image files.

Domain Age & History AI & SEO Images & Videos PDF & Files

Should you really block alternative images with robots.txt instead of using x-robots-tag?

John Mueller Dec 21, 2018 ★★★

To control which versions of images are indexed, Google recommends using the robots.txt file to block alternative versions. While x-robots-tag is primarily for web pages, blocking via robots.txt works for images.

Domain Age & History Crawl & Indexing AI & SEO Images & Videos PDF & Files Redirects

Does Google Cache really reveal what Googlebot sees on your JavaScript page?

John Mueller Dec 21, 2018 ★★

Google's cache shows the initial static HTML version of the page. If the page has an error after loading, it could be caused by JavaScript or anti-phishing protections on the site.

Domain Age & History AI & SEO JavaScript & Technical SEO Web Performance

Does modifying your content always lower your Google ranking?

John Mueller Dec 21, 2018 ★★★

When you modify a page's content, Google reevaluates and reindexes the page. This does not necessarily mean a drop in ranking; the effects vary depending on whether the content improves or deteriorates for SEO.

Domain Age & History Content Crawl & Indexing AI & SEO

Can changing your WordPress theme destroy your SEO?

John Mueller Dec 21, 2018 ★★★

Changing a website's theme can influence its rankings, particularly if it modifies the internal link structure. This can affect indexing and requires careful management of the changes.

Crawl & Indexing Links & Backlinks Pagination & Structure

Why are individual 301 redirects essential during a site merger?

John Mueller Dec 21, 2018 ★★★

When merging sites, expect a temporary drop in rankings. Ensure that 301 redirects are correctly configured for each page individually to preserve SEO as much as possible.

Domain Age & History AI & SEO Redirects

Do unlinked brand mentions actually pass PageRank?

John Mueller Dec 21, 2018 ★★

Your brand mentions on other websites without a direct link can be recognized by Google, but they do not pass PageRank like a hyperlink.

Domain Age & History Content AI & SEO Links & Backlinks

Is content personalization at risk of being seen as cloaking by Google?

John Mueller Dec 21, 2018 ★★★

Personalizing the homepage for repeat users is not considered cloaking, as long as the result remains relevant for the end user. Googlebot does not store cookies, which can make managing personalization easier.

Domain Age & History Content Crawl & Indexing Penalties & Spam

Why does Google confuse your regional pages with duplicate content?

John Mueller Dec 21, 2018 ★★★

When Google confuses regional pages as duplicates, it can be due to an ambiguous site structure. Ensure that each page uses unique URLs and specific content to avoid indexing confusion.

Domain Age & History Content Crawl & Indexing Domain Name Pagination & Structure

Is dynamic rendering still essential for Single Page Applications?

Martin Splitt Dec 21, 2018 ★★★

Google is working to better integrate JavaScript rendering and crawling. However, for frequently updated content, dynamic rendering is still recommended to ensure fast and effective indexing.

Domain Age & History Content Crawl & Indexing AI & SEO JavaScript & Technical SEO