- Online shopping has benefits like saving time and fuel but also privacy concerns if personal and payment details are not secure. - Websites track user behavior through various tools like session recording, engagement tracking, and analytics to understand browsing patterns, improve features and recommendations, and see what drives purchases. - However, this tracking means personal data is at risk if breached, as demonstrated by malware attacks on Yahoo and Cleartrip that compromised advertising servers and user information. - Users can increase privacy with tools like ad blockers, Ghostery, and incognito windows, but websites need user data to better optimize the customer experience.