Cost-per-click CPC bidding means you pay for each click on your ads. In CPC campaigns, you set a maximum cost-per-click bid (or “max. CPC”) unless you make large adjustments or use Enhanced CPC.
Average daily budget Your average daily budget specifies how much you’re comfortable spending each day for the month. You can adjust it anytime.
Monthly spending limit Your monthly spending limit is the most you’ll spend on a campaign in a single month. It’s calculated by multiplying your average daily budget by the average number of days in a month.