210. Online Advertising › how it works › advertising networks and advertising exchangesCPM favours the publisher, while CPA favours the advertiser. Sometimes, ahybrid of the two payment models is pursued.Typically, high traffic, broad audience websites will offer CPM advertising.Examples include web portals such as www.yahoo.com or news sites likewww.cnn.com.Figure 8.7 CNN.com is an example of a website that offers CPM advertising. discussion How do you think yourNiche websites with a targeted audience are more likely to offer CPA advertising campaign objectivesto advertisers with an appropriate product. These can also fall under the would differ if you wereumbrella of affiliate marketing. advertising car insurance vs. organic cat food? WhatTypes of advertising can be seen on a scale from more intrusive (and thus sort of websites would you target for each?potentially annoying to the consumer) to less intrusive. In the same way,payment models can be scaled from those that favour the publisher to thosethat favour the advertiser.When planning a campaign, it is important to know how the advertising will bepaid for and what kinds of advertising are offered by publishers. A lot of thiscan be solved by using a company which specialises in advert serving, mediaplanning and media buying.8.4.4 Advertising Networks andAdvertising ExchangesAn advertising network is a group of websites on which adverts can bepurchased through a single sales entity. It could be a collection of sites ownedby the same publisher (e.g. AOL, CNN, Sports Illustrated are all owned by AOL/Time Warner) or it could be an affiliation of sites that share a representative. 207