How does yandex calculate the context?

Question

Yandex

Brad, of course, and a little paranoia, but the fact is a fact. In the morning I climbed to look at something in javascript, then I looked at the mail (on Yandex). It is clear that while I was looking at the mail, Yasha unobtrusively offered me all sorts of different ads with javascript related, but when he showed me an ad for "*** code", a cough remedy, I felt creepy. I've been coughing since morning, but how could this rubbish know ... Really uncomfortable. Closed up the peephole of the camera and the microphone. I know you're an idiot, but how did this bastard know? Just a coincidence?
PS removed the name of the medicine, no matter what they think ...

Answer 1

Closed up the camera eye and microphone

forgot about the tinfoil hat and window vibrators

Answer 2

like the season, probably ... Do not be surprised if winter tires are offered

Answer 3

Firstly, at first he gave you your request in context, then he sees that you are not following and starts another advertisement on the list. For example, it looks at your region and the weather, cool means pills, hot means drinks, etc. etc.
The context is constantly watching you and keeps a history of your preferences, so it tries to offer you what you are supposed to need.

Answer 4

Search engines have been monitoring user actions for a long time and store a history of visited pages and queries entered. But the user agreement states that your personal data will not be disclosed to third parties.

Answer 5

Coincidence.
History in the spirit of ithappens =)