Most people know that their smartphones collect some data, but only a few pay attention to how much information is quietly collected in the background. Your search activity, app usage, location history, and more can be stored automatically. I only noticed this when I opened my activity history just out of curiosity, and it had a detailed record of places I had visited earlier. No, nothing is malicious. These features are there to offer a personalized experience. But it was surprising to see how much information it had accumulated.