(A) Conv. value/click tells you how often, on average, an ad click or other ad interaction leads to a conversion.
(B) Conv. value/cost tells you approximately how much, on average, each of your conversions is worth.
(C) Conv. value/click is what you gain each time someone clicks on your ad. It is the value of your total conversions according to clicks.
(D) Conv. value/cost estimates your return on investment. It measures the value of how many people buy your product vs. how much you’re paying for their ad clicks.
Explanation
Conv. value/click also known as Conversion value per click is what you gain each time someone clicks on your ad. It is the value of your total conversions according to clicks.
Conv. value/cost also known as Conversion value per cost estimates your return on investment. It measures the value of how many people buy your product vs. how much you’re paying for their ad clicks.
Conclusion
This question is from the Analyze data with Hiroko chapter which is a part of the Analyze and Optimize with Conversion Data lesson unit. You can get answers to all the questions asked in this lesson in our Analyze and Optimize with Conversion Data Answers page.