Overview
The advertising network market is a large and growing market, with the top 20 companies earning about $2 billion in revenues during 2007. This represents around 13% of the total display advertising market, forecasted to grow to 18% by 2010. This growth has resulted in many new players in the market, and has encouraged acquisitions of ad networks by large companies entering the market.
Ad networks are primarily involved in selling space for online ads to appear. This online advertising inventory comes in many different forms, including space on websites, in RSS feeds, on blogs, in instant messaging applications, in adware, in e-mails, and on other sources. The dominant form of inventory continues to be third-party websites, who work with advertising networks for either a fee or a share of the ad revenues.
An advertiser can buy a run of network package, or a run of category package within the network. The advertising network serves advertisements from its central ad server, which responds to a site once a page is called. A snippet of code is called from the ad server, that represents the advertising banner.
Large publishers often sell only their remnant inventory through ad networks. Typical numbers range from 10% to 60% of total inventory being remnant and sold through advertising networks.
Smaller publishers often sell all of their inventory through ad networks. One type of ad network, known as a blind network, is such that advertisers place ads, but do not know the exact places where their ads are being placed.
Large ad networks include a mixture of search engines, media companies, and technology vendors.
Read more about this topic: Advertising Network