Is there a minimum number of days you’re aiming for or budget you’re spending before you feel like you have significant feedback ad efficiency?

Some people will wait 3-5 days to let an ad run before really reviewing the results. Leah usually gives an ad 3 days to run.

Leah measures her ads at one day, three days, one week, and one month, each taken with a grain of salt, but instead look at the overall big picture. An ad might perform really well one day and not great the next day. Make sure not to make a hasty decision based on a knee-jerk reaction. It also depends on what the ad objective is. If you are spending more than your profit margin, then you need to revisit your ad objective. If have to know what you are willing to spend to begin with, what are you willing to pay in order to acquire a customer or make a sale.