Given a part of privacy policy text, identify the purpose for which the user information is collected/used. The purpose should be given inside the policy text, answer as 'Not Specified' otherwise

The site collects your demographic information for a basic service or feature. Collection happens in an unspecified way, and your data is identifiable.
Basic service/feature

Users with accounts can edit their information, within the scope of information explicitly provided by the user.
Not Specified

You can opt out (via a link) from the use of activities on the website or app by the site, which uses it for marketing purposes.
Marketing