There are two options in the CitrusAd system:
The system will let you select a maximum spend per day. Once you have exhausted your daily spend, your ads will stop showing until the next calendar day where your campaign will resume its new daily budget for that day.
The system will allow for funds to be spent as quickly as possible for the campaign until they run out. \
Selecting a maximum ensures that your campaign stops when this budget is exhausted, and ensures that the campaign never exceeds the limit that you set. For testing, this can be any value as you will be allocated adequate testing credits.
The value you select will only act as the maximum amount that can be spent.
Select the maximum cost per click for the campaign.
Visit the Average Winning Cost Per Clicks page for more information