Danny Sullivan discusses Google's search business in December 2015. While Cost Per Click (CPC) rates are dropping year-over-year, Google's paid click volumes and total ad revenues continue growing as it expands into new ad formats like shopping, hotels, and insurance. However, the mobile search landscape remains uncertain as companies like Apple and Microsoft develop their own voice assistants, and it is unclear how much mobile users search within apps versus employing standalone search engines. Overall, Google Search remains strong across both desktop and mobile devices.