Marketing? get in here yesterday
 

ok statistic and marketing wizards, here are two simple questions

how many impressions are enough to measure a CTR?

how many clicks are enough to measure conversions?


This is for the adult industry.

In my opinion, 9K impressions to measure a CTR, and 9K clicks to measure conversions.

a) at least one impression and at least one click.

b) conversions are a metric, they are not measured by click.