Google AdWords positions all the paid listings in the search results of Google as well as a few other search engines. It also emerged the winner at the 4th Annual Search Engine Watch Awards. Online Advertising Group gives useful hints on forging a partnership with Google AdWords. There is also information on how the AdWords program works.

Overture is one of the well known placement search engines. It places its paid listings on a large number of search engines. It was founded in the year 1997 as GoTo. It worked on the World Wide Web worm. A year later however it switched over to pay-for-placement formulae. It was in 2001 that the company acquired its name Overture. Yahoo took over the company in the year 2003. It bagged the second prize at the 4th Annual Search Engine Watch Awards.

Msn belongs to the core body of Microsoft Network. MSN ad centre is an autonomous body under MSN responsible for advertising services and products. One of the top most features of MSN ad centre is undoubtedly pay per click advertisement. Like Yahoo and Google, MSN has also developed its own pay per click system. Infact these are the only three biggies (Google, Yahoo, MSN) with pay per click system of advertisement.

It was from June 2006 that MSN began search result advertising full fledged on its own.

Espotting.com

It is one of the important placement services that have an extensive distribution spanning across Europe and UK. In 2004 it got together with FindWhat and is now a division of the latter. It was noted at the 4th Annual Search Engine Watch Awards for its placement service.

Findwhat.com

It has a wide distribution on some of the most important Meta search engines. It is one of the reputable placement service engines. Its contribution was noted at the 4th Annual Search Engine Watch Awards.

LookSmart LookListings

It offers not only the traditional PPC-based paid listings but also the PPC-based paid inclusion listings. It has a good distribution in some of the Meta search engines.