# How Is CPM Traffic Calculated?

Michelle LaSalle

When dragging an Entry Point object onto the canvas, you must define a Traffic Source. Under "Acquisition Type", there are two options available: Impressions or Clicks.

To use CPM (or Cost per One Thousand Impressions), select "Impressions" from the drop down menu as shown below:

For this example, the values shown above are taken directly from a Facebook ad campaign as shown here:

Using the example numbers from the above FB campaign, GERU displays the number of link clicks (visitors to the Opt-In object) and the Traffic Cost...

NOTE: Due to number rounding, you may notice some minor differences as shown above \$282.18 versus \$282.08

Here is a breakdown of the CPM math and calculations using the above Facebook & GERU numbers:

\$11.81 CPM = \$11.81 per 1,000 impressions

0.37% CTR = 3 clicks per 1,000 impressions
(23,893 impressions /1000) X \$11.81 CPM = \$282.18 Traffic Cost
Link Clicks = 23,893 impressions x 0.37% CTR = 88 Clicks