Google's advertising tracking and location history are two features that allow the company to collect and use data for advertising and personalization purposes.

Advertising tracking involves collecting information about the websites and apps you visit and the searches you perform to show you more relevant ads. This data is used to build a profile of your interests and preferences, and then to serve targeted advertisements.

On the other hand, location history tracks your physical movements using GPS and Wi-Fi data and stores this information in your Google account. This data is used to provide you with personalized recommendations, such as traffic updates and nearby restaurant suggestions.

While these features can provide useful services, they also raise privacy concerns. Some users may feel uncomfortable with the amount of data that Google collects and the potential for this data to be shared with third-party advertisers.

Users can choose to opt out of personalized advertising by adjusting their ad settings in their Google account, and can also turn off location tracking and delete their location history.

However, this may limit the functionality of certain Google services that rely on this data. It is important to review and adjust your settings regularly to ensure that you are comfortable with the data that is being collected and used.