Using a variety of sources, data brokers gather a lot of information about users, for example:
1. Name
2. Address (both current and previous addresses)
3. Date of birth
4. The floor
5. Family status
6. Presence of children, their number and age data
7. Social Security Number
8. Level of education
9. Facilities
10. Profession
11. Phone number

Data brokers collect vast amounts of personal and behavioural data from various sources to create detailed consumer profiles. The information they gather includes basic demographics such as name, age, gender, address, phone number, and email. They also track financial data like credit scores, purchase histories, and income levels.

Behavioural data, including browsing habits, social media activity, app usage, and location data, is often compiled to understand preferences and interests. Data brokers may also collect public records, such as court documents, voting records, or professional licenses.

This information is aggregated from online activity, loyalty programs, surveys, and public databases. Companies use these profiles for targeted advertising, credit assessments, and market research, often raising privacy and ethical concerns.