I attend a podcast made by one of the marketing legends over here in my country. It is full of insight on how someone can win with paid advert and make me stop the money from the advert spending. But the keynote from the podcast is that is it marketing legend said that someone needs to buy click from ads platform. You said all our calculation should based on the click rather than other metrics people are looking out for. This got me confused as I have a course which stated data I need to focus on impression. So I want to ask that is it better to pay for click or impression?