I was looking for information on collecting the semantic core in Yandex, and literally a couple of hours later I received a message in VK with a service offer?

Question

Marketing

I searched Yandex for information on collecting the semantic core, and literally a couple of hours later I received a message in VK with a service offer.
The question is how it is technically implemented. There's something I can't quite figure out, can anyone tell me?

Answer 1

This is the black method. Yandex has been cutting sites in search results for it for the second year already.
The site had an invisible "Like" button from VK. More precisely - a lot of buttons, in all places free

Answer 2

Retargeting via like or auto like