Google rolled out a mobile-friendly algorithm. That isn't come as surprise. As the mobile search queries on smartphones now outnumber those on tablets and desktops.Nonetheless, the announcement was unprecedented in one respect: Google ostensibly manages some 200 algorithms that govern how websites are ranked in its search engine, but changes or adjustments rarely, if ever, trigger public notice. This time, Google announced the change in mobile search months ahead to give companies time to optimize websites for mobile users.