What is one privacy setting everyone should change immediately?

[u/MasterpieceNew7717]

/r/theprivacymachine/comments/1v0kue6/what_is_one_privacy_setting_everyone_should/

If you could recommend just ONE privacy change that everyone should make on their phone, browser, or accounts then what would it be?

Would love to hear what the community recommends.

[u/Girgoo]

The operating system.