Depending on the cost metrics you choose you’ll pay accordingly.
For cost per click campaigns you are paying on a per click basis.
To protect our advertisers we have a click validation system in
place to analyze every click and ensure they are human generated.
When we are suspicious of the click we will refund the ‘suspicious’
amount back to your advertiser account.
If you choose to advertise via the cost per visitor (CPV) option
you are paying for every visit that your site is shown to the
user. For the cost per thousand impressions (CPM) option you are
paying for every thousand of impression that your ad is displayed
to the user.