Unless you enable Incognito/ Private mode on your mobile browser, your browsing is tracked by companies. They use this information to show you adverts they think you'll be interested in. Ghostery is a free iOS browser that shows you which companies are tracking you. You can find out more about each tracker and disable it, or keep your browsing anonymous from every tracker by disabling all of them at one go. It even lets you block trackers on other browsers you use on your device.
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