Google tracks users across its various products and services to personalize their experience, deliver targeted advertisements, and improve its offerings. Let's break down how Google tracks users :

Chrome :

 A widely used web browser collects users' browsing history, bookmarks, and other data to personalize their online experience. For instance, if you search for "best hiking trails" on this browser, this information might influence the ads you see or the articles suggested in your news feed.

YouTube : 

The video-sharing platform monitors users' viewing history, liked videos, and subscriptions to tailor video recommendations. For example, if you frequently watch cooking tutorials, you may receive suggestions for new recipes or cooking channels.

Photos :

 The photo management service examines uploaded images to categorize them and offer functionalities such as automatic album creation. For example, upon uploading a picture of your dog, the system might automatically label it and propose creating a pet photo album.

Calendar :

 Calendar applications track events and appointments to send personalized notifications and reminders. For instance, if you have a dentist appointment scheduled, you might receive a reminder on your smartphone.

Ads :

Ads services utilize data from various sources, including search and browsing history, to display targeted advertisements. For example, if you frequently search for travel destinations, you may see ads for flights or hotels.

Shopping : 

Shopping features track product searches and browsing activity to offer personalized recommendations. For instance, if you search for 'running shoes,' you might see ads for specific brands or retailers.

Maps :

Maps, the location-based service, monitors location history and search queries to offer personalized recommendations and directions. For instance, if you search for restaurants, Maps may suggest nearby dining options.

Hangouts :

Hangouts, a messaging platform, may track chat history and contacts to improve message delivery. For example, if you chat about hiking trips, Hangouts may suggest related information or events.

Gmail :

 The email service from Google analyzes email content and contacts to provide features like Smart Reply and categorization. For instance, if you receive a flight confirmation, the email service may automatically add the details to your calendar.

Search : 

Search engines track queries and browsing behavior to deliver personalized results and ads. For example, if you search for vegetarian recipes, you might see results tailored to your preferences.

Drive :

 Drive tracks file activity to provide features like file suggestions and collaboration tools. For instance, if you collaborate on documents, the platform may suggest shared folders.

News :

News aggregation services track reading habits to deliver personalized articles. For instance, if you frequently read tech news, the platform may suggest articles from relevant sources.

In summary, tracking occurs across multiple Google products and services through the collection and analysis of user interactions, preferences, and activities. This data drives personalized user experiences, targeted advertisements, and enhancements to Google's services. While this practice can improve usability and convenience, users should consider the privacy implications and have options to manage their data settings and preferences.