Why does Google pay Apple tens of billions of dollars annually to be Safari’s default search engine?

Google pays Apple tens of billions of dollars annually to be Safari’s default search engine because iPhone (and Mac and iPad) users are demographically desirable (to any company that like to make profits) versus non-iPhone users.
Apple’s Safari icon
Eva Dou And Trisha Thadani for The Washington Post:Lucrative, closed-door dealings between two of the world’s most powerful tech companies are under scrutiny at the Google antitrust trial in Washington, as senior Apple executives pr