What parameters are used to evaluate the quality of contextual advertising settings?

Question

contextual advertising

I am new to contextual advertising, new potential customers ask for "cases" and "my work". What do I need to provide them? "whiskers, paws and tail - these are my documents") It seems that I set it up not badly, but by what parameters can this be assessed? Now I'm setting up in Yandex Direct

Answer 1

min max median cost per click in the topic
attracted traffic
attracted useful traffic