Google is the leader in online search (Google Search), online video sharing (YouTube), email services (Gmail), web browsing (Google Chrome) and online mapping-based navigation (Google Maps and Waze), mobile operating systems (Android) and online storage (Google Drive) as well as a variety of other popular tech services. Google Cloud is the third largest player in the cloud computing market after Amazon and Microsoft. Google and Facebook hold a duopoly over the digital advertising market.[59] Google's advertising business makes up 82% of its revenues and most of its profit.[60]