Same as CPM. The average cost for every 1,000 impressions delivered to your target audience.
Formula: Cost per 1,000 People Reached = (Total Amount Spent / Total Reach) x 1000
Example: If you spent $100 on an ad that reached 5,000 people, the Cost per 1,000 People Reached would be $20 (($100/5,000) x 1000 = $20)
