Where do large companies buy traffic?

Question

contextual advertising

Even on some of the most godforsaken sites, advertisements for Eldorado, Kaspersky, and various banks constantly pop up. Joycasino separate hello)) From whom to buy such advertising? who is more or less reliable? that is, we need mass advertising throughout Russia. And the most interesting is how the price is formed?

Answer 1

Погуглите- Google КМС, Яндекс РСЯ))

Answer 2

You look at the source and find whose ad server is used there.

Answer 3

Companies make offers in CPA networks, and from there, traffic arbitrators generate leads (some on their websites, some from contextual networks). This is profitable, the company does not pay for empty clicks, only for real customers.

Answer 4

ads for Eldorado, Kaspersky, all kinds of banks constantly pop up

This is called retargeting and remarketing. All this is also available to you through YandexDirect and Google Adwords. The price is formed by you and the advertising auction.
Joycasino probably works differently. Look at ad networks rmbn, adwise, advmaker.
And most importantly, don't be impressed by the fact that you see someone's ads everywhere. Your advertising should not impress, but bring you profit.