https://www.cnbc.com/2017/09/25/siri-search-results-switch-to-google-from-bing.html >Google — not Microsoft's Bing — will now be the default for web searches on Siri, iOS, and Macs' "Spotlight" function, Apple said on Monday. >Search engines such as Google and Bing are monetized through advertisements — which means that the number of eyeballs that view the results is very important. With nearly 15 percent of phones worldwide using iOS, according to IDC, Apple's default search engines represent a sizable audience, even if those users don't always click through to the respective search pages.