What is the difference between CPM and CPC in PPC advertising?

CPM (Cost Per Mille) and CPC (Cost Per Click) are two common pricing models used in PPC advertising:

CPM (Cost Per Mille):

In CPM, advertisers pay for every 1,000 impressions of their ad. This means the cost is based on the number of times the ad is displayed, regardless of whether users click on it or not.

CPC (Cost Per Click):

In CPC, advertisers pay each time a user clicks on their ad. The cost is directly tied to the number of clicks the ad receives, rather than the number of impressions.

Choosing between CPM and CPC depends on the advertising goals and budget of the campaign. CPM can be useful for brand awareness, while CPC may be more beneficial for driving traffic and leads.