What is the name of this website service?

Question

Web development

Tell me what is the name of such a service for the site or how can this be done?
For example, when I go to some site I look for goods or services. I do not leave my contact information. And then they contact me by E-mail\phone with the offer of services.
How do they do it on websites?

Answer 1

Do you like to surf the Internet logged into social network accounts?
This is called Clickjacking . The site checks that you are logged in to the social network, and can, for example, find out the address of your VK page and email.
The vulnerabilities above have been closed under public pressure, but new ones are constantly being found. And I fully admit that the vk.com database is drained, then the phone number will also be available.
PS: if you log in to the site through social network accounts , they generally receive information about you on a regular basis without any clickjacking.

Answer 2

Suppose there is a service X that is engaged in the work of identifying users for further transfer to marketing agencies for the purpose of better targeting, there is a site A that you love, on which you left your data, this site A entered into an agreement with service X to attract more customers , in exchange for money and customer data. And so, you go to site B, where you didn’t leave your data, but this site B also cooperates with service X, which identifies you by the fingerprint of the browser / device and sends in a report for site B all the information they need that service X received from site A
Z.Y. on site A in the privacy policy 100% it is indicated that all your data can be transferred to third parties

Answer 3

For this, I usually remind callers about 137 of the Criminal Code of the Russian Federation, a violation of privacy. There's a big fine. They usually apologize very quickly and don't call back.

Answer 4

illegal