Pay per click,Pay per impression, Pay per lead,Pay per action

These are the common Adverting options.That is Pay per click means if an ad is placed in you website and some vistors of your website clicked on that ad you get profit.The profit depends upon quality of traffic and origin of traffic.That if an advertiser is targeted people from specific regions then the click from that regions given you more profit for that click.Some advertisers are in need of USA customers ,so the click from that region will gives you more income.Also it depends upon qulaity of traffic.Means you are getting a lot of clicks but the company is not getting much profit from the clicks originated from your website, the your website will be in doubts that if you are creating fake traffics.Then the amount for that clicks will be low.So dont ever try to click your own ads or create fake clicks as it will only lower the website status and you will not be getting anymuch profit from them.