Search Networks
In the world of paid search there are 6 search networks which account for approximately 99% of the market. Of these 6 networks the majority of market share is held by the "big 3" Google, Yahoo & MSN.

The paid search networks are often confused with the search engines themselves; however, they are actually two separate things. Often the paid search networks will have their own search engines e.g. Google, Yahoo, MSN etc...,however, they also have a network of affiliated partner sites which display their paid results alongside the search engines own organic listings e.g. AOL, ASK, Lycos etc...

