Googlebot/2.1

Googlebot/2.1 is the user agent string used by Google's web crawler, Googlebot, to identify itself when accessing and indexing web content. This user agent string is structured as follows: Mobile User Agent : 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) Desktop User Agent : Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) In these strings, Googlebot/2.1 indicates the version of the crawler, and the URL +http://www.google.com/bot.html provides more information about Googlebot. ( developers.google.com ) It's important to note that Googlebot's user agent strings have evolved over time. In December 2019, Google announced plans to update Googlebot's user agent strings to reflect the new Chrome-based rendering engine used by Googlebot. This update aimed to ensure that Googlebot accurately represents the browser version it uses for rendering web pages. ( developers.google.com ) For the most current information about Googlebot and its user agent strings, you can refer to Google's official documentation at http://www.google.com/bot.html .