What is a site-targeted campaign in Google Adwords?

[Jihanemo]

What does it mean if you have a site-targeted campaign/ad?

[Lukene]

Pay per click (PPC)

Pay per click (PPC) is an advertising model used on websites, advertising networks, and search engines where advertisers only pay when a user actually clicks on an ad to visit the advertiser's website. When a user types a keyword query matching the advertiser's keyword list, the advertiser's ad may appear on the search results page. These ads are called "sponsored links" or "sponsored ads" and appear next to, and sometimes, above the natural or organic results on the page. The advertiser pays only when the user clicks on the ad.
Pay per click advertising is a search engine marketing technique.
To make the most of this medium the advertiser needs to "steal eye balls". The advertiser needs to refer traffic to his/her web site. The best way to do this is by assigning the Pay per click (PPC) to another web site.
For example,
The Google ads on this web site http://www.drivingschools-a-to-z.com/ are "stealing" the quality traffic that this web site is getting. Every click they get is a quality click, since the "eye balls" are already focused on "Driving Schools".
Find a web site that has quality traffic, and place your ads there.

[John P]

it means that the advertiser targets its ads to a specific website only, not across the whole Google AdSense network.