Googlebot-Mobile now crawls with a smartphone user-agent in addition to its previous feature phone user-agents, announced Google Webmaster Central blog.
"The content crawled by smartphone Googlebot-Mobile will be used primarily to improve the user experience on mobile search. For example, the new crawler may discover content specifically optimized to be browsed on smartphones as well as smartphone-specific redirects," informs Google.
Google also launched "Skip Redirect for Smartphone-Optimized Pages" features. "When we discover a URL in our search results that redirects smartphone users to another URL serving smartphone-optimized content, we change the link target shown in the search results to point directly to the final destination URL. This removes the extra latency the redirect introduces leading to a saving of 0.5-1 seconds on average when visiting landing page for such search results," explains Google.
Here are the main user-agent strings that Googlebot-Mobile now uses:
Feature phones Googlebot-Mobile:
- SAMSUNG-SGH-E250/1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 UP.Browser/22.214.171.124.c.1.101 (GUI) MMP/2.0 (compatible;Googlebot-Mobile/2.1; +http://www.google.com/bot.html)
- DoCoMo/2.0 N905i(c100;TB;W24H16) (compatible; Googlebot-Mobile/2.1; +http://www.google.com/bot.html)
- Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7 (compatible; Googlebot-Mobile/2.1; +http://www.google.com/bot.html)