What is the definition of actual cost-per-click (CPC)?

What is the definition of actual cost-per-click (CPC)?
  • The least possible CPC the advertiser needs to pay to maintain an achieved position.
  • The average CPC the advertiser needs to pay in order to achieve top position.
  • The CPC according to a price list, which is then updated daily.
  • The CPC an advertiser was charged minus credits for overshot daily budget.
The correct answer is:
  • The least possible CPC the advertiser needs to pay to maintain an achieved position.

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