Most websites collect a lot of information on a visitor, which is then used to track them across the web and target ads. If you’re uncomfortable with that, consider setting up an ad blocker or installing specialized extensions that limit what any site can see about your device and activity.

Overall, iOS has many built-in security and privacy protections turned on by default. There are additional features that can help shield your data from falling into the wrong hands. Under Settings –> Privacy –> Advertising, you can select “Limit Ad Tracking” to control how much information is shared between apps.