I think there are a couple main reasons why the research aspect is so overlooked in affiliate marketing. The first reason is, people are just lazy. Most new affiliate marketers are only thinking about making money in the shortest period of time, so they simply choose a niche and build a site in their first day. Then, months go by with little to no website traffic and they proclaim that affiliate marketing no longer works. Considering affiliate marketing is a multi-billion dollar per year industry driving about 20% of all online sales, that of course isn’t true. Most people just don’t do the research necessary to truly find a profitable niche that is in demand without too much competition.
Affiliate marketing is also called "performance marketing", in reference to how sales employees are typically being compensated. Such employees are typically paid a commission for each sale they close, and sometimes are paid performance incentives for exceeding objectives. Affiliates are not employed by the advertiser whose products or services they promote, but the compensation models applied to affiliate marketing are very similar to the ones used for people in the advertisers' internal sales department.
When it comes to traffic for sales or leads it varies from industry to industry and country to country, on the top of that it requires other complex process that are suitable only for the advanced paid traffic masters. In this article I will be discussing traffic for branding and improving rank on several web metrics which are responsible for judging the quality of a website such as Alexa rank, Similarweb Rank, Domain Rating, WOT Rank and so on.