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Google has published a new page on which Google explains how Google renders web pages for indexing.
Googlebot uses a web rendering service (WRS) that is based on Chrome
41 (M41). Generally, the WRS supports the same web platform features and
capabilities that the Chrome version it uses. However, there are a few
exceptions and differences that you should keep in mind.
Features and APIs that are explicitly disabled or limited
1. The web rendering service and Googlebot don't support WebSocket protocol
Googlebot and WRS only understand HTTP/1.x and FTP, with and without TLS. Use the website audit tool in SEOprofiler to check the HTTP version of your website:
2. The web rendering service disables some interfaces and capabilities
- IndexedDB and WebSQL interfaces are disabled.
- Interfaces defined by the Service Worker specification are disabled.
- WebGL interface is disabled; 3D and VR content is not currently indexed.
If you want to find out if Googlebot's web rendering service supports a certain block of code, use feature detection.
3. Googlebot and the web rendering service are stateless across page loads
Googlebot's web rendering service loads each URL of your page,
following server and client redirects, just like a regular browser.
However, the web rendering service does not retain state across page
- Local Storage and Session Storage data are cleared across page loads.
- HTTP Cookies are cleared across page loads.
If a page on your website requires a cookie that was set by another page on your website, this won't work.
4. The web rendering service declines permission requests
Any features that requires user
consent are auto-declined by the Googlebot. For example, Camera API,
Geolocation API, and Notifications API. A full list can be found here
There is an easy way to check your pages
Making sure that Googlebot can index your web pages can be a
complicated and time-consuming task. Fortunately, there is an easy way
to check your pages. The website audit tool
in SEOprofiler checks all pages of your website and it also shows you
the things that you have to change so that Google can index your web
When you get an okay from the website audit tool in SEOprofiler, you
can be sure that Google and other search engines can index your pages.
If you haven't done it yet, check your pages now:
your website now
Google: serving content by user-agent language is a bad idea
"On Twitter, Google’s John Mueller said that it was a bad idea to server content based on the user-agent language setting.
desktop browsers have settings that allow you to check or change the
language preference settings. These tell the server what language you
prefer for pages and resources that it sends you (separately from the
language of the browser user interface). This setting will be used in
the user-agent information.
Unfortunately, John Mueller did not explain why it was not a good idea to server content based on the user-agent language."
John Mueller: it does not matter if your website is with or without www
Twitter, Google’s John Mueller
said that you can use your website domain name with or without www. For
Google, both versions are the same.
Of course, you should focus on one version of the domain. Use redirects
and/or the canonical tag to show Google the preferred version of the
John Mueller: the size of your CSS files doesn’t matter
Twitter, Google’s John Mueller
confirmed that the size of a CSS file has no influence on the rankings
of a website. [...] Google can handle very large files and the size of
a CSS file is usually not a problem for Google."
NY Times: Google doesn’t want what’s best for us
"[Google] has altered our notions of
privacy, tracking what we buy, what we search for online — and even our
physical location at every moment of the day. Every business trying to
reach mass-market consumer demand online knows that Google is the
Because tools like Google and Facebook have
become so essential and because we have almost no choice in whether to
use them, we need to consider the role they play in our lives. By
giving networks like Google and Facebook control of the present, we
cede our freedom to choose our future."
SEARCH +++ ENGINE +++ NEWS +++ TICKER +++
- Google does not use the geo meta tags on your web pages.
- Bing testing Google-like search header at top of search results.
- Google testing ad tag placement in Google Local Packs.
- Google tests "topics" search refinements.
- Google has updated the list of reasons for reporting
inappropriate business photos.
- Facebook: addressing cloaking so people see more authentic posts.
- Google still ignores last-modified meta tag.
- Google won't share the number of search quality algorithms.