Answer:
pay-per-click (each time a user clicks a link to a retailer’s website).
Explanation:
Pay-per-click is the cost stipulated by online survey platforms for each click on a sponsored ad.
Popularized by Google AdWords, this is one of the most used metrics for digital marketing, mainly because of the ease of having measurable digital advertising efforts.
The great advantages of this metric is the possibility of measuring and monitoring the number of users who will click on your link, making it more effective to analyze the impact that your business media has on people.