Search engine optimization glossary for confused marketers

Pay for inclusion (PFI)

Pay-for-Inclusion services are designed for Webmasters that are having trouble getting pages listed in spider-based search engines. A main benefit of PFI is fast respidering (every 48 hours or so), giving site owners and Webmasters instant positioning feedback and the ability to change content frequently. Also, site owners can submit deep-linked pages and be guaranteed that the URL will be included.
The typical PFI program is an annual URL-based subscription with regular refresh cycles and click-based reporting. These programs are highly effective and potent for use in conjunction with seasonal campaign pages.

Pay per Click (PPC)

Pay per Click is a type of search marketing where advertisers pay a set amount every time their ad is clicked by a prospect (otherwise known as a click thru).
Some search engines, such as Overture, specialize in this type of advertising medium, although pay per click is not limited solely to pay-per-click engines. For instance, Looksmart, a directory, recently changed its business model to pay per click. Also, XML trusted feeds through Inktomi and Fast are sold at a per-click basis.

PPC