Gemini's recommendations will draw upon a database spanning more than 300 million places and reviews from more than 500 million contributors that have been accumulated since Google Maps' debut more than 20 years ago. Google executives declined to answer a question about whether the company eventually plans to sell ads to boost businesses' chances of being displayed in Ask Maps' recommendations. Ask Maps initially will be available on Google Maps' mobile app for iPhones and Android software in the U.S. and India, before expanding to personal computers and other countries.