We are using AMP in mobile search rankings: You
may have heard that here at Google we're obsessed
with speed. As part of that effort, today we're
including a new signal in our search ranking
algorithms: The usage of accelerated mobile pages
(AMP) for even faster results in mobile search results!
Rudy Galfi, Google’s lead product manager for AMP, told me that the global
rollout would be complete by the end of the year. He reiterated that this does not
represent a rankings change. AMP pages won’t get a special boost in mobile
results. However, when there are two versions of a page, Google will prefer and
link to the AMP version. AMP pages open within the AMP viewer and load much
faster than conventional web pages — typically in less than a second.
As Googlebot is currently configured, it will halt all crawling of
the site if the site’s robots.txt file returns a 503 status code for
robots.txt. This crawling block will continue until Googlebot
sees an acceptable status code for robots.txt fetches. This is a
built-in safety mechanism so that Googlebot doesn't end up
crawling content it's usually blocked from reaching.