Since I've decided that what the world needs next is a good "dictionary" for marketing lingo, here we go with my first entry.

PPC - Pay Per Click - Near as I can tell, this is sort of like a count store only there are more agents in the middle.

Actually, it's pretty much self descriptive.

The short version. A person who wants to advertise something; i.e. a website, an affiliate program, etc.; pays for an advertisement on someone's website based on how many times the ad is clicked upon.

The long version. The location where the advertising is shown is often lined up by a third party, the Super agent; i.e. Google, Adbrite, etc. The advertiser pays the Super agent and the other agents that show the ad get their cut.

Many times the advertiser must bid the highest in order to get the Super agent to let him play the game. And, in all cases the Super agent gets first count.

Many times, you could be better off approaching the website where you'd like to display your ad directly. They may offer you a weekly, monthly or other flat rate or possible a PPC deal of their own. At least you only have one agent to outcount you then.