AIDA Cost per Acquisition Cost Per Click CPC 
ClickDimensions
MARCH 8, 2023
AIDA (Attention, Interest, Decision and Action)- A four-step purchase funnel where customers travel from attention to action. CPA can be competitive which in turn leads to high costs. CPC (Cost Per Click)- With this model, you pay each time a person clicks on your ads.
Hubspot
JUNE 19, 2014
AIDA: Attention, Interest, Desire, Action. CPA: Cost-per-Action. An internet advertising model where the advertiser pays for each specified action someone takes, like an impression, click, form submit, or sale. You can decide if a given action is a lead or a sale.
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