Google collects data about how you use its devices, apps, and services. This ranges from browsing behaviour, Gmail and YouTube activity, location history, Google searches, online purchases, and more. Anything connected to Google is likely used to collect data on your activity and preferences.
Google uses the information shared by sites and apps to deliver its services, maintain and improve them, develop new services, measure the effectiveness of advertising, protect against fraud and abuse, and personalize content and ads you see on Google.
Though the data it tracks is fairly extensive, Google provides users with information on how to pause the collection and even delete any data that Google has on them. The company also outlines precisely what data it collects and how it’s used in its Privacy Policy.