An advertiser wants to know the minimum amount of money that she must spend on an AdWords campaign. What should you tell her?
- There is no minimum
The correct answer is:
There is no minimum
Explanation: There is no minimum amount needed for Adwords campaign. Even the bid is charged on the basis of Quality Score and Ad Rank. Your Quality Score is a measure of how relevant your ad is to a customer, and includes multiple performance factors like view rates. Once your Quality Score is determined, it’s multiplied by your max CPV bid to rank your ads among other advertisers. That’s called Ad Rank.
Read more here: https://support.google.com/adwords/answer/2472735