How does Yandex understand the geographic location of a person?

Question

Yandex

Let's say I'm from Novosibirsk. I don't have to set up Yandex and it will rank me as Novosibirsk by ip address. But I can manually set Moscow - does Yandex really believe that I'm in Moscow (with Novosibirsk ip) and give me Moscow issuance without suspecting anything? It's just that you can raise any requests of any regions by behavioral factors, simply by forcibly changing the city ..
And can someone else tell you how Google does this business?

Answer 1

But what about advertisers who, for example, want to show direct ads only to Muscovites? Is it possible to do something so that advertising is not shown to such false Muscovites?

Answer 2

believe
the problem is that the behavioral factor is strongly at the end of the tail of factors affecting Yandex