A television that is also a computer
A smart TV is a screen with a small computer, an operating system and an internet connection built in. That is what lets it run streaming apps, show a home screen full of recommendations and update itself. It is also what lets it collect information. Unlike a traditional television, a connected one can record what happens on it and report back to its maker or to partners.
Data collection by itself is not a sign of wrongdoing. Makers often use it to improve products, personalize recommendations and fund cheaper hardware through advertising. The privacy question is how much is collected, how it is used and whether you can meaningfully control it.
What kinds of data may be collected
The exact list depends on the brand, the model and the region, but the general categories are similar:
- Device and account details, such as the model, software version and network identifiers.
- App usage, meaning which apps you open and for how long.
- Interactions, such as searches, button presses and voice commands.
- Viewing information, including what you watch through built-in apps or from connected sources.
- Advertising identifiers, which help link activity on the TV to an advertising profile.
Whether any of this is tied directly to a named person or kept in a more anonymous form varies, and privacy policies do not always make the difference obvious.
Content recognition
One of the most discussed features is automatic content recognition, often shortened to ACR. In general terms, the TV periodically captures a small sample of what is on screen or what is playing, such as a fingerprint of the picture or sound. It compares that fingerprint with a reference database to work out which show, film or advert is being displayed.
The notable aspect is that this can apply to whatever appears on the screen, not only to the TV’s own apps. That can include a game console, a cable box or a streaming stick plugged into an HDMI port, depending on how the feature is implemented. The result is a detailed record of viewing habits over time.
Makers typically describe this as a way to offer recommendations and to measure which adverts people see. Whether you find that acceptable is a personal judgment, which is why the setting should be easy to find and change.
Ad profiling
Viewing records can be combined into a profile: the types of programmes you watch, when you watch and what you tend to skip. Advertisers may use such profiles to choose which adverts appear on your TV or to measure whether an advert reached a household. The same advertising ID may link to activity on other devices, which connects the television to the wider world described in our articles on targeted advertising and online tracking.
Data from TVs can also be shared with or sold to third parties, such as measurement companies and advertising partners. The wider ecosystem of buyers and sellers is the subject of our piece on data brokers. Policies differ, and it is worth reading what yours says about sharing.
Why viewing habits can be sensitive
Viewing choices can reveal more than people expect. They can hint at interests, beliefs, health concerns, family composition or daily routines. Even without a name attached, a household-level profile can be revealing. This is a reason to treat the data with some care, without assuming the worst about any specific company.
Where the settings usually live
Menus differ by brand, and updates can move things around, so the names below are general rather than exact. In most TVs, the relevant options sit in the main settings menu under headings such as:
- Privacy, Terms and policies or Data and privacy
- General, System or Support
- Advertising, Interest-based ads or Ad preferences
- Viewing information, Viewing data services or Live Plus style names for recognition features
Things to look for include switches for content recognition, personalized advertising, and sharing of usage data. There is often also an option to reset your advertising ID. Voice features and microphones may have their own switches, and our articles on smart speakers and voice assistant routines discuss the trade-offs of always-listening hardware.
During initial setup, TVs often present a series of agreements on a screen that is easy to click through. If you have already accepted them, you can usually review and change your choices later. If you cannot find the controls, the manual or the maker’s support site is the next place to look.
Other steps that may help
- Limit what the TV connects to. If you mostly use an external streaming device, you can leave the TV’s own smart features unconnected from the internet, though this limits updates and some functions.
- Use a separate network. A guest network can keep the TV apart from laptops and phones.
- Check app permissions on the TV, as you would on a phone. Our piece on what app permissions allow covers the idea.
- Keep it updated. Software updates fix security problems, but note that they can sometimes reset or add settings, so it is worth checking after a major update.
- Review when you sell or recycle it. Perform a factory reset and sign out of your accounts so your apps and history do not go with the TV.
A balanced view
You do not need to give up a smart TV to protect your privacy. A few minutes in the settings menu usually lets you turn off the most intrusive features, accept the ones you find useful and understand the rest. Be aware that settings can change with updates, that turning off a feature does not erase data already collected, and that different regions give different legal rights over that data. If you want more control, a TV used mainly as a display for a device you manage yourself is one option.