How did Yandex.Direct find out about the request to Google?

Question

contextual advertising

1) I reposted a picture about crushed stone in VK - cs636823.vk.me/v636823896/8b01/-rc-hHAycmM.jpg (the word you are looking for below is not there in text form, only driven into jpeg)
2) I searched in Google for "gravel 600333", I didn’t go anywhere
3) I open a certain site, there is a Yandex.Direct ad block on the relevant topic, the word “rubble” is highlighted in bold
Question. How could Poison know about my (ahem) interest?
All this within 4 minutes, I have never been interested in gravel, such an advertisement has never been shown to me.
Chrome browser. Maybe some extensions are burning ...

Answer 1

I think it was like that.
Yandex knows your profile in VK (I found out earlier from another link), you posted a picture, Yandex checked the database and saw that this picture is most often referred to by the "rubble" link. I added 2 + 2 and realized that you showed interest in rubble.
In general, this is the first time I hear about Yandex, I didn’t think that the capacities would allow it, but Google openly uses such things.
And they also have some agreements with AdSense, they exchange 100% advertising of their products, maybe they agreed on something else.

Answer 2

It is necessary to install Ghostery and AdBlock, then this will not happen.
And often clean cookies from Yandex, mail, Google, Facebook, tns, etc.

Answer 3

What browser are you using? Any extensions from x*Yandex installed?

Answer 4

Может ВКонтактик слил?

Answer 5

Сейчас открыл страницу ВК, она тянет файлы с mail.ru, яндекса и ещё пачки левых серверов, возможно так и узнает.

Answer 6

On one of the first sites in the search results, there was a Yandex.Metrica counter (most likely, it was on all sites in the search results). It analyzes how the transition to the site was made. Obviously, Yandex uses this information for itself.
You did not open links - they were cached , a mechanism introduced in Chrome recently to speed up surfing through pages for users; counters, apparently, have not yet taught him to ignore.
No conspiracy theory.