Google Analytics is a free web analytics service that provides insights into website and app usage. It helps you understand how visitors interact with your website or app, so you can make informed decisions about how to improve the user experience. With Google Analytics, you can track pageviews, bounce rate, time
From Wikipedia
Google Analytics is a web analytics service offered by Google that tracks and reports website traffic and mobile app traffic and events, currently as a platform inside the Google Marketing Platform brand. Google launched the service in November 2005 after acquiring Urchin.