These metrics help you understand what you are paying for and how efficiently your ads are performing.
CPM (Cost Per Mille)
The cost to show your ad 1,000 times. This measures how expensive it is to reach your audience.
Formula: (Total Spend / Impressions) x 1,000
CPC (Cost Per Click)
The cost for each click on your ad. Useful for measuring traffic efficiency.
Formula: Total Spend / Clicks
CPA (Cost Per Acquisition)
The cost for each conversion (purchase, lead, etc.). This is the metric that matters most for ROI.
Formula: Total Spend / Conversions
Which Matters Most?
CPA is the most important metric for performance campaigns because it directly measures the cost of achieving your goal. Low CPM and CPC are nice, but meaningless if they do not translate to conversions.