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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★★★ Should you really use cross-domain canonicals to consolidate multiple thematic sites?
Using canonical tags across multiple domains (e.g., 25 thematic stores pointing to a main store) is technically correct. It avoids duplicate content but may redistribute SEO strength among the domains...
John Mueller Oct 29, 2020
★★★ Does lazy loading really harm your content's indexing by Google?
When rendering a page, Google uses a fairly high viewport and indexes everything that loads within this viewport. If content requires a specific action (scroll, click on 'Read more'), it will probably...
John Mueller Oct 29, 2020
★★★ Does the canonical tag really transfer 100% of PageRank without any loss?
When Google follows a canonical tag, all SEO signals including PageRank are transferred to the canonical URL. There is no loss of value when the canonical is used correctly....
John Mueller Oct 29, 2020
★★ Should you really differentiate between the visible date and the structured data date?
The visible date on the page should reflect substantial changes to the main content. For structured data (sitemaps, headers), you can include minor changes like new comments or sidebar adjustments, bu...
John Mueller Oct 29, 2020
★★★ Do 302 redirects really pass on as much PageRank as 301 redirects?
Google uses numerous signals to determine the canonical URL: 301/302 redirects, rel canonical, internal/external links, sitemap, appearance of the URL. A long-term 302 can be treated as a 301 if it st...
John Mueller Oct 29, 2020
★★★ Do 302 redirects really pass as much PageRank as 301s?
Both 301 and 302 redirects pass exactly the same signals, including PageRank. The difference is solely in canonicalization: Google may index the original URL with a 302, but signals are never lost wit...
John Mueller Oct 29, 2020
★★★ Should you really return a 404 for products that are permanently unavailable?
For temporarily unavailable products, displaying a 200 page is acceptable. But for products that are permanently unavailable, using a 404 (or soft 404) status allows Google to crawl more efficiently b...
John Mueller Oct 29, 2020
★★ Does Google instantly change the canonical URL after removing a redirect?
When a redirect is set up and then removed, the canonicalization algorithms do not perceive the site as deceptive. They look at the current state. Google tends to be persistent with the canonical URL ...
John Mueller Oct 29, 2020
★★★ Should you really index all your pagination pages?
You need to decide whether pagination pages should be indexed based on whether they are critical for discovering products. If products are well linked elsewhere on the site, pagination does not need t...
John Mueller Oct 29, 2020
★★★ Should you really archive out-of-stock products instead of leaving them marked as unavailable?
For permanently out-of-stock unique products, it is preferable to move them to an 'archives' or 'reference' section rather than keep product pages marked as 'out of stock'. This allows images to remai...
John Mueller Oct 29, 2020
★★★ Does Googlebot really ignore HSTS 307 redirects, or is there a catch?
Googlebot does not interact with 307 redirects generated by HSTS. These 307 redirects are not real server-side redirects but rather redirects generated by the Chrome browser to indicate that it is app...
John Mueller Oct 28, 2020
★★★ Does Googlebot actually ignore your forced HTTPS redirects?
Googlebot attempts to crawl URLs with a clean slate and doesn’t retain any HSTS list. It accesses HTTP URLs directly without applying the browser's HSTS rules....
John Mueller Oct 28, 2020
★★ Does Googlebot really follow HTTP redirects to HTTPS like a regular browser?
When Googlebot accesses an HTTP URL that redirects to HTTPS (which is typically the case for a site with both HTTP and HTTPS), it will follow this actual server-side redirect normally....
John Mueller Oct 28, 2020
★★ Can 307 HSTS redirects really harm your site's SEO?
Googlebot does not see the 307 HSTS redirects that you would see in a browser, and this poses no issue for SEO. 307 HSTS redirects do not affect Google's crawling....
John Mueller Oct 28, 2020
★★★ How Does Google Rank Specific Passages Within a Page Without Creating a Separate Index?
Google recently announced that it would strengthen its ability to rank certain parts of a text (such as a paragraph), even when these are included in overall content with a different meaning. On this ...
Danny Sullivan Oct 27, 2020
Should You Really Limit the Number of Outbound Links on a Web Page?
For years, Google has indicated that there is no limit to the number of outbound links (internal or external) on a web page that are read by the search engine's robots. However, Gary Illyes indicated ...
John Mueller Oct 27, 2020
★★★ Does Publishing First Really Guarantee Google Will Recognize You as the Original Author?
John Mueller indicated on Twitter that the fact that Google indexes content first does not make that content original and "canonical". In other words, just because a spammer plagiarizes your content b...
John Mueller Oct 27, 2020
★★★ Should you really list all your products on your e-commerce site to rank higher?
To help users find and navigate an e-commerce site, all products sold must be clearly published, whether in-store, online, or both. This assists Google in indexing this information and presenting it t...
Daniel Waisberg Oct 20, 2020
★★★ Why does Google insist that you upload ALL your inventory to Merchant Center?
It is recommended to upload the complete product inventory to Google Merchant Center for products sold online and offline. This allows for quicker data updates (prices, stock levels), provides richer ...
Daniel Waisberg Oct 20, 2020
★★★ Do structured data errors really block the indexing of your pages?
Errors in structured data disqualify content from appearing in rich results, but the page can still be displayed for relevant searches as a simple blue link. For instance, if the markup is missing the...
Daniel Waisberg Oct 20, 2020
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