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ZDNET's key takeaways
Marketing and advertising agencies want your data.
Organizations want to know your location, how you shop, and more.
Explore our guide to preserve your right to privacy.
Companies often have access to more data about you than you realize -- and many records used to profile you won't require your outright, knowing consent.
Whenever you browse a website, submit a search query, accept a cookie notice, make a purchase, post on social media, or even visit a location, your activity may be recorded. Now, a singular visit to a website doesn't tell a marketer much about you, your interests, or what you might be interested in buying -- but over time and multiple interactions, a detailed picture of you forms.
Also: The best data removal services of 2026: Expert tested and reviewed
Your personal details, location, purchase history, income bracket, interests, and more may all be recorded and linked to your IP address, email, or social media presence.
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