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

Test your SEO knowledge in 5 questions

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🕒 ~1 min 🎯 5 questions
★★★ Do site-wide links in the menu and footer really dilute the PageRank of your strategic pages?
Having multiple site-wide links to the same page (for example, in the menu and footer) does not significantly dilute the PageRank passed to other pages. Google understands that certain pages, like the...
Aug 21, 2020 ⚡ Analysis available
★★★ Should you still tag your affiliate links with rel=sponsored?
For common affiliate configurations (Amazon, Booking, eBay), Google already recognizes these URLs and treats them as nofollow links internally. Therefore, there is no risk of penalty if you have not a...
Aug 21, 2020 ⚡ Analysis available
★★★ Does having ads on your site really hurt your Google rankings?
Adding advertising to a site does not negatively affect rankings, as long as certain rules are followed: visible content above the fold (not just ads), compliance with the Better Ads Standards. Moneti...
Aug 21, 2020 ⚡ Analysis available
★★★ Can JavaScript really hide your links from Google without destroying them?
If an HTML link remains present in the rendered code even when a JavaScript event captures the click (e.g., mobile dropdown menu), Google processes it normally. The only problematic case is if the HTM...
Aug 21, 2020 ⚡ Analysis available
★★★ Does nofollow really block indexing, or can Google still crawl those URLs?
Google can now follow nofollow links to discover new URLs and potentially index them. However, the passing of PageRank and ranking signals through nofollow remains independent and is not guaranteed: j...
Aug 21, 2020 ⚡ Analysis available
★★ Is it really necessary to manually de-index your old pagination URLs?
When pagination is removed, old paginated URLs either return the homepage (automatically canonicalized) or a 404 (de-indexed upon recrawl). Google manages this naturally over time without any manual d...
Aug 21, 2020 ⚡ Analysis available
★★ Are URL parameters still an obstacle for organic search?
URLs with parameters (query strings) have been perfectly acceptable to Google for a long time. The URL parameter management tool is only useful for very large sites (millions of pages) generating an e...
Aug 21, 2020 ⚡ Analysis available
★★ Is it really necessary to duplicate your structured data between mobile and desktop?
If a site displays the same content twice (once for desktop, once for mobile with display:none), it is sufficient to include structured data only once. Including it twice increases the risk of desynch...
Aug 21, 2020 ⚡ Analysis available
★★★ Why does Google ignore identical modification dates in your sitemaps?
If all URLs in a sitemap have the same modification date (for example, today's date), Google completely ignores this lastmod field and uses the sitemap only to discover new URLs, not to prioritize re-...
Aug 21, 2020 ⚡ Analysis available
★★★ Do internal 301 redirects really dilute PageRank?
If your internal links point to URLs that redirect via 301, Google follows the redirect, identifies the final URL as canonical, and treats the link as if it points directly to the destination. No loss...
Aug 21, 2020 ⚡ Analysis available
★★ Do security alerts in Search Console really block Google's crawling?
Security alerts in Search Console (malware, phishing, hacked site) do not affect how Google crawls the site, but they can impact the display of pages in search results. Google remains cautious about w...
Aug 21, 2020 ⚡ Analysis available
★★★ Is Google really merging your multilingual pages into a single canonical URL?
When a site has identical content pages targeting different countries (e.g., French Canada vs. France), Google may group (fold) them into a single canonical version in the index. In Search Console, on...
Aug 21, 2020 ⚡ Analysis available
★★★ Does Google Discover really use the same quality algorithms as traditional search?
Google Discover is part of the Search systems. It uses the same crawling, indexing, content understanding processes and the same quality algorithms as traditional search. Major algorithm updates for S...
Aug 21, 2020 ⚡ Analysis available
★★ Should you really implement hreflang across an entire multilingual site?
Hreflang can be used selectively: only on certain pages (homepage, key pages) without needing to implement it site-wide. It’s a page-level annotation, not a global requirement....
Aug 21, 2020 ⚡ Analysis available
★★★ Do affiliate links really harm your website's SEO?
The presence of affiliate links on a site is not a sign of poor quality. Affiliate sites become problematic when they lack value-added content, for example, if they simply copy product feeds or genera...
Aug 21, 2020 ⚡ Analysis available
★★★ Should you really index all paged pages to optimize your SEO?
For pagination, all pages should be indexable if they contain important content or links. They must be connected with standard HTML links (next/previous). Google can crawl and index these pages withou...
Aug 21, 2020 ⚡ Analysis available
★★★ Why does Google measure Core Web Vitals on the actual page version your visitors are really viewing?
For Core Web Vitals (a future ranking signal, announced at least 6 months in advance), Google will analyze the page that real users predominantly view (AMP or standard HTML depending on the user journ...
Aug 21, 2020 ⚡ Analysis available
★★ Is it really necessary to nofollow site-wide links to your legal pages to optimize PageRank?
Having 10 links instead of just one to a legal page (privacy, contact) on every page of the site probably wouldn't change anything. Google understands that these pages are linked everywhere without be...
Aug 21, 2020 ⚡ Analysis available
★★ Should you really ditch display:none to differentiate mobile and desktop?
Using display:none to hide content based on the device (desktop or mobile) does not pose a major issue for Google, but a purely responsive layout is recommended in the long run to facilitate maintenan...
Aug 21, 2020 ⚡ Analysis available
★★★ Does Google really track HTML links that are hidden by JavaScript?
If an HTML link exists in the code but a JavaScript event captures the click (for example, to display a dropdown menu instead of navigating), Google can still see and follow that HTML link. The <a> el...
Aug 21, 2020 ⚡ Analysis available
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