What does Google say about SEO? /
John Mueller is one of Google's most active spokespeople on search engine optimization topics. As a Search Advocate, he regularly answers the SEO community's questions during Google Search Central sessions and on social media. His statements are a prime source of information for understanding how Google Search works and the best practices to follow.
Quick SEO Quiz

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🕒 ~1 min 🎯 5 questions
★★ Does Google prioritize image quality over the display order on the page?
Google uses several factors to determine which image to display from a page: titles, filenames, captions, alt text, and also the quality of the image. The systems may sometimes prefer a higher quality...
Feb 05, 2021 ⚡ Analysis available
★★ Why do PageSpeed Insights and Googlebot show different results for your site?
PageSpeed Insights is based on Chrome, not Googlebot. Googlebot also uses Chrome for rendering but must obey robots.txt for all embedded content (CSS/JS), unlike PageSpeed Insights. The differences be...
Feb 05, 2021 ⚡ Analysis available
★★ Should you really match the query in the title to rank well?
There is no absolute rule indicating that an exact match title ranks better than a user-focused title. Google understands synonyms and context. The recommendation is to test different titles to see wh...
Feb 05, 2021 ⚡ Analysis available
★★★ Should you create broad topical content to boost your authority in Google's eyes?
Creating content around a main topic (e.g., laptop reviews if you sell laptops) helps Google recognize your thematic expertise. It also helps users trust you. Google can then show your site for search...
Feb 05, 2021 ⚡ Analysis available
★★ Why does Google omit certain unique sites in its results?
Two different sites with unique content, even on the same topic (e.g., two astrology sites), should be ranked individually. If Google treats them as identical and omits one, it's potentially a problem...
Feb 05, 2021 ⚡ Analysis available
★★★ Why does Google overlook your Lighthouse scores when ranking your site?
For the Core Web Vitals ranking signal, it is the field data that is taken into account, not lab data....
Feb 05, 2021 ⚡ Analysis available
★★ Can machine learning really replace text for SEO-ing your images?
Google can use machine learning to extract information from images (objects, actions). However, this does not replace other SEO factors. It's an auxiliary signal that can help differentiate similar im...
Feb 05, 2021 ⚡ Analysis available
★★★ Do user comments really influence your page rankings?
Google considers comments as part of the page content. Google often recognizes that this is a comments section and treats it differently. If users find your pages through comments, removing those comm...
Feb 05, 2021 ⚡ Analysis available
★★ Is machine learning for images truly a secondary SEO factor?
While Google uses machine learning to understand the content of images, it is more of an auxiliary factor than a primary one. Determining the relevance of an image solely based on its content is chall...
Feb 05, 2021 ⚡ Analysis available
★★★ Is it true that Google penalizes category pages lacking strict thematic consistency?
If a category page displays random products without cohesion (e.g., a 'blue' category featuring mixed socks and jackets), Google will struggle to recognize the page as a landing page. All products nee...
Feb 05, 2021 ⚡ Analysis available
★★★ Is Google really penalizing wide or inconsistent e-commerce categories?
For e-commerce categories, consistency is key. A 'blue jackets' category should contain only blue jackets. If a category includes random products (e.g., 'blue' with socks and jackets), Google will str...
Feb 05, 2021 ⚡ Analysis available
★★★ Does Google penalize dynamic content on e-commerce pages?
For e-commerce pages with automatically changing products, Google considers this normal. The key is that individual products should be findable via persistent links. If the products match the category...
Feb 05, 2021 ⚡ Analysis available
★★★ Why does Google Discover traffic seem to vanish overnight?
Traffic from Google Discover can be highly volatile, quickly shifting from a significant amount to zero. Google's algorithms determine whether content should appear in Discover. This is not tied to a ...
Feb 05, 2021 ⚡ Analysis available
★★ Why does Google keep rechecking your old 404 URLs for years?
Google keeps old 404 URLs in its systems and periodically rechecks them (sometimes once a year) to ensure they still return 404. This is not a problem. On older sites, the number of 404 URLs naturally...
Feb 05, 2021 ⚡ Analysis available
★★★ Can a poorly optimized homepage really penalize an entire site?
Google tries to be as granular as possible, page by page. But the pages of a site are linked to each other. If an important page (e.g., homepage) has a poor score, it will affect the other pages becau...
Feb 05, 2021 ⚡ Analysis available
★★★ Is it true that the text/HTML ratio is completely irrelevant for Google SEO?
Google does not use the concept of text/HTML ratio as an SEO ranking factor. Many tools calculate this metric, but it does not affect SEO. Only two extreme cases can pose a problem: reduced page speed...
Feb 05, 2021 ⚡ Analysis available
★★★ How does Google measure Core Web Vitals on your AMP and non-AMP pages?
Google tracks Core Web Vitals data from real users. If users access the AMP version via Search and the non-AMP version directly, Google can follow both versions separately. For ranking purposes, Googl...
Feb 05, 2021 ⚡ Analysis available
★★ Why does Google convert your SVGs into pixel images internally?
Google converts SVG files into pixel images internally to process them consistently with other images, particularly to create thumbnails and manage sizing. Vector formats like SVG do not have a well-d...
Feb 05, 2021 ⚡ Analysis available
★★ Why can manual link actions take several months to get a response?
Manual link actions can take several months to be reviewed. Resubmitting a reconsideration request does not have negative effects, but duplicates are ignored. If it takes a long time, consult the help...
Feb 05, 2021 ⚡ Analysis available
★★★ Does Google really impose page-by-page granular penalties instead of site-wide ones?
Google does not have different levels of demotion at the site level (either everything gets demoted or nothing). The approach is as granular as possible, page by page. There is a smooth transition rat...
Feb 05, 2021 ⚡ Analysis available
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