How do people do it?

Question

In contact with

In general.............
I enter the word "Orthodoxy" in the search bar of groups, and in the advertisement in the column on the side, an advertisement of Orthodox crosses and some kind of Orthodox literature immediately drops out.
Question
How could they parse my ID after I entered the word "Orthodoxy" in the search box on the group tab?
Is it possible to do this through the VK API, if so, how?

Answer 1

ставь ghostery
а делают так, как код аналитикса или метрики с сооовсем другого домена, поставленный на твой сайт, дает инфу о твоем домене

Answer 2

god sees everything

Answer 3

And here ID? It’s just contextual advertising, it’s not people who do this, but Yandex.Direct, etc., and if you want to do the same, then you can only create your own advertising network, you can use malicious (Adware): you infect computers with a trojan, and it shows on these computers your advertisement.

Answer 4

I'm sorry, I didn't ask the question correctly. We are talking about the search line in VKontakte in the group section. How exactly did they parse my id right after I entered the word orthodoxy in the search for a contact among groups