Cost per mille requires only that the publisher make the advertising available on his or her website and display it to the page visitors in order to receive a commission. Pay per click requires one additional step in the conversion process to generate revenue for the publisher: A visitor must not only be made aware of the advertisement but must also click on the advertisement to visit the advertiser's website.
They tell you that the first step in the process is to choose a niche. In my opinion, this should be pretty easy for you determine before you even decide to get started. If not, then internet marketing may not be for you. The reason I say this is due to the amount of effort required to build a profitable business from scratch. If you can’t think of one single thing that excites or interests you, then you are going to have an uphill struggle if you plan to make a go of it in affiliate marketing.