ChatGPT has this option "Improve the model for everyone" in user preferences, which comes with the attached description, meaning that training on user data can be deactivated:
> Allow your content to be used to train our models, which makes ChatGPT better for you and everyone who uses it. We take steps to protect your privacy. Learn more
The "Learn more" link takes you to the link you've shared.
> Allow your content to be used to train our models, which makes ChatGPT better for you and everyone who uses it. We take steps to protect your privacy. Learn more
The "Learn more" link takes you to the link you've shared.