Algorithms for placing contextual advertising

Question

contextual advertising

Tell me where to read about the algorithms used inside contextual advertising systems? First of all, we are interested in algorithms that determine the most profitable ads for placement.

Answer 1

Here this issue is indirectly addressed: www.computerra.ru/print/gid/273541/

Answer 2

In my opinion, all algorithms are described in the certificates of these systems, the benefit of an ad is a value equal to ctr multiplied by the cost of a click.
What kind of weird questions do you have?