Updating the smartphone user-agent of Googlebot

Ecompromo | March 15, 2016 | SEO Resources

As technology on the web changes, we periodically update the user-agents we use for Googlebot. Next month, we will be updating the smartphone user-agent of Googlebot:

Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.96 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
(Googlebot smartphone user-agent starting from April 18, 2016)

Today, we use the following smartphone user-agent for Googlebot:

Mozilla/5.0 (iPhone; CPU iPhone OS 8_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12F70 Safari/600.1.4 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
(Current Googlebot smartphone user-agent)

We’re updating the user-agent string so that our renderer can better understand pages that use newer web technologies. Our renderer evolves over time and the user-agent string indicates that that it is becoming more similar to Chrome than Safari. To make sure your site can be viewed properly by a wide range of users and browsers, we recommend using feature detection and progressive enhancement.

Our evaluation suggests that this user-agent change should have no effect on 99% of sites. The most common reason a site might be affected is if it specifically looks for a particular Googlebot user-agent string. User-agent sniffing for Googlebot is not recommended and is considered to be a form of <a target="_blank" …read more

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