Pay per action?

[geobals]

Can any one explain me about pay per action?How can i create pay per action ads?Which search engine is working in pay per action basis?
Thanks

[guitaristinus]

There are:
- pay per impression
- pay per click
- pay per action - such as commission on a sale or an amount for completing a form.

Ad servers like tribalfusion and fastclick pay per impression.
AdSense pays per click.
Commission Junction has merchants that pay for action.

[kodaks]

Is a pay for action as same as a pay for lead? I always thought so.

[ShantiShunn]

Yes, a lead is an action. Also, a download can be an action and a purchase can be an action.