How does the store calculate me?

Question

contextual advertising

Please tell me how the store calculates me. I understand approximately how contextual advertising works (I went to the product, got into cookies, and then it’s clear). And how can it be that I receive letters from the store in the mail with information that I had them. I'm not auto-authenticated, I don't remember if I gave them mail, but this time I deliberately entered a disposable one. And they send me the basic information that I forgot to buy exactly the product that I ordered for a temporary one, which does not belong to the mail and is not even an additional address from the main mail. I noticed the same thing at other large stores.
What is the name of this technology. Thanks to all

Answer 1

Something like this happened: your email and your browser fingerprint (fingerprint) were linked by one record in the database of some tracker.
How and where it was, it is difficult to say. For example, you go to a site (shop) where this tracker is located - it takes an imprint. Next, enter your email. The site sends an email to the tracker. That's it, you are in the database, 1 + 1 = info about you. Or a social network can act as a tracker - then you yourself enter your email there. In general, what was, was.
And then everything is simple. Go to any site where the same tracker is located, it takes an imprint from you, looks at the email database and sends it to the site. This is how bases can be exchanged, sold.
To avoid this, you need to either 1) not show your email anywhere, or 2) block trackers. For example, the Ghostery plugin does a good job of this.
Of course, in theory there may still be viruses. You can also use the Tor browser. But this is already much closer to paranoia than what I described above.

Answer 2

Browser snap. You gave a different mail, and the browser most likely remained the same with the same settings. So they determined that this is one and the same person, just joking.

Answer 3

I think that fingerprint is too far-fetched. Firstly, it is unreliable, and secondly, the cookie is more than enough. Why make some casts if you can just put a cookie and then read it?
But sending to the main mail, despite the fact that it was entered once, is a strong violation of privacy. In fact, it's 100% spam. And it almost never happens these days. I would say that the explanation should be much simpler.
And most likely it is a social network. As an inveterate paranoid, I basically do not understand how you can be logged into a social network in your main working browser. This is - I don't know - how to make glass walls in an apartment, to flaunt your whole life. But in any case, the mechanism here is simple - the social network shares your profile with the store and the store simply takes your email from it.
So no "casts" and "databases" - everything is much simpler.